<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:7d2b88a0-597d-4690-939b-8b2e61a68941,g:186ccbe4-72b3-4a32-9f5f-dbff4de49892-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://balchem.com/role/ConsolidatedStatementsofStockholdersEquity" xlink:type="simple" xlink:href="bcpc-20241231.xsd#ConsolidatedStatementsofStockholdersEquity"/>
  <link:definitionLink xlink:role="http://balchem.com/role/ConsolidatedStatementsofStockholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_9b0772a2-dd55-436a-a913-9d5d313c8423" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_e3d0a65b-18f3-4ce7-a54e-f245b9210ac7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_9b0772a2-dd55-436a-a913-9d5d313c8423" xlink:to="loc_us-gaap_StatementTable_e3d0a65b-18f3-4ce7-a54e-f245b9210ac7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_507aeac0-bac8-474b-a3a2-224c464fd91e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_e3d0a65b-18f3-4ce7-a54e-f245b9210ac7" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_507aeac0-bac8-474b-a3a2-224c464fd91e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_507aeac0-bac8-474b-a3a2-224c464fd91e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_507aeac0-bac8-474b-a3a2-224c464fd91e" xlink:to="loc_us-gaap_EquityComponentDomain_507aeac0-bac8-474b-a3a2-224c464fd91e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_53c7324f-adbe-4974-be84-061bf6e268cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_507aeac0-bac8-474b-a3a2-224c464fd91e" xlink:to="loc_us-gaap_EquityComponentDomain_53c7324f-adbe-4974-be84-061bf6e268cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_bc2714d8-086e-408b-90dc-ff4f8718e7e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_53c7324f-adbe-4974-be84-061bf6e268cf" xlink:to="loc_us-gaap_RetainedEarningsMember_bc2714d8-086e-408b-90dc-ff4f8718e7e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_b71eb446-b9cc-4d7e-9e66-a8528795d954" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_53c7324f-adbe-4974-be84-061bf6e268cf" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_b71eb446-b9cc-4d7e-9e66-a8528795d954" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_5da1c505-9e8b-4ad7-991b-79c7cb8897f8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_53c7324f-adbe-4974-be84-061bf6e268cf" xlink:to="loc_us-gaap_CommonStockMember_5da1c505-9e8b-4ad7-991b-79c7cb8897f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_d7587c1a-d566-44a0-9715-50d99f12a3d8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_53c7324f-adbe-4974-be84-061bf6e268cf" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_d7587c1a-d566-44a0-9715-50d99f12a3d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9b0772a2-dd55-436a-a913-9d5d313c8423" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_62fee248-6be1-4148-9520-3d60eb344197" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:to="loc_us-gaap_StockholdersEquity_62fee248-6be1-4148-9520-3d60eb344197" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_35dc509c-cc68-4009-814b-dde9d9734ecc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_35dc509c-cc68-4009-814b-dde9d9734ecc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_99473b40-7b5b-419f-b8a2-291af0612163" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:to="loc_us-gaap_NetIncomeLoss_99473b40-7b5b-419f-b8a2-291af0612163" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_7d907888-c0ee-4342-8866-4206ea6c1af7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_7d907888-c0ee-4342-8866-4206ea6c1af7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_ef3e2c62-e5ef-403e-b248-adce891d6c61" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:to="loc_us-gaap_DividendsCommonStock_ef3e2c62-e5ef-403e-b248-adce891d6c61" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockRetiredParValueMethodAmount_9c767f01-14f3-47c4-a0d4-a13f5625e95a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockRetiredParValueMethodAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:to="loc_us-gaap_TreasuryStockRetiredParValueMethodAmount_9c767f01-14f3-47c4-a0d4-a13f5625e95a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesRetired_b277b40f-e305-4038-bf9a-84d924e87d2e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TreasuryStockSharesRetired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:to="loc_us-gaap_TreasuryStockSharesRetired_b277b40f-e305-4038-bf9a-84d924e87d2e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_54363356-f53a-43e7-863b-fe68ee2a7ff0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_54363356-f53a-43e7-863b-fe68ee2a7ff0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_1476172f-3283-4b23-b0bb-77a7ade7d3bc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_beda5d73-f30a-4ef2-bf94-67c75f3bd797" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_1476172f-3283-4b23-b0bb-77a7ade7d3bc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_67a726ce-48c0-4818-b6de-8bfc3c1fef34" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_f00c4129-bd90-4182-9b27-cdd4c6082838" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesOutstanding"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/BUSINESSDESCRIPTIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPropertyPlantandEquipmentUsefulLivesDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#BUSINESSDESCRIPTIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPropertyPlantandEquipmentUsefulLivesDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/BUSINESSDESCRIPTIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPropertyPlantandEquipmentUsefulLivesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_b5c43585-4933-4258-b1b6-f09bb500773e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c69ed2ae-ac11-4e46-b3c7-16360fa13dac" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_b5c43585-4933-4258-b1b6-f09bb500773e" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c69ed2ae-ac11-4e46-b3c7-16360fa13dac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_febe61f9-8a0c-455e-8363-9c32ad363af9" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c69ed2ae-ac11-4e46-b3c7-16360fa13dac" xlink:to="loc_srt_RangeAxis_febe61f9-8a0c-455e-8363-9c32ad363af9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_febe61f9-8a0c-455e-8363-9c32ad363af9_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_febe61f9-8a0c-455e-8363-9c32ad363af9" xlink:to="loc_srt_RangeMember_febe61f9-8a0c-455e-8363-9c32ad363af9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_524b967c-1a88-479b-9607-5e2b15285cf2" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_febe61f9-8a0c-455e-8363-9c32ad363af9" xlink:to="loc_srt_RangeMember_524b967c-1a88-479b-9607-5e2b15285cf2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_60f28e85-7cb9-4da1-b3bd-cc9cf40bfc3c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_524b967c-1a88-479b-9607-5e2b15285cf2" xlink:to="loc_srt_MinimumMember_60f28e85-7cb9-4da1-b3bd-cc9cf40bfc3c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_2eacc0b8-5094-4b8a-af2a-ef8514a0788d" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_524b967c-1a88-479b-9607-5e2b15285cf2" xlink:to="loc_srt_MaximumMember_2eacc0b8-5094-4b8a-af2a-ef8514a0788d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_26e05383-6bfd-4712-a2a5-12c86ecc760f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c69ed2ae-ac11-4e46-b3c7-16360fa13dac" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_26e05383-6bfd-4712-a2a5-12c86ecc760f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_26e05383-6bfd-4712-a2a5-12c86ecc760f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_26e05383-6bfd-4712-a2a5-12c86ecc760f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_26e05383-6bfd-4712-a2a5-12c86ecc760f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_70d9f013-422c-46dc-a063-a1b6458a34b2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_26e05383-6bfd-4712-a2a5-12c86ecc760f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_70d9f013-422c-46dc-a063-a1b6458a34b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_9dd0dbc0-02dd-452a-9a79-2560950c5603" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_70d9f013-422c-46dc-a063-a1b6458a34b2" xlink:to="loc_us-gaap_BuildingMember_9dd0dbc0-02dd-452a-9a79-2560950c5603" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquipmentMember_9023b814-b0b6-4027-a302-3a02df89a805" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_70d9f013-422c-46dc-a063-a1b6458a34b2" xlink:to="loc_us-gaap_EquipmentMember_9023b814-b0b6-4027-a302-3a02df89a805" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_4ac5064b-17a9-4087-bd9f-5aeafc599228" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_b5c43585-4933-4258-b1b6-f09bb500773e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_4ac5064b-17a9-4087-bd9f-5aeafc599228" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/BUSINESSDESCRIPTIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESIntangibleAssetsUsefulLivesDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#BUSINESSDESCRIPTIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESIntangibleAssetsUsefulLivesDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/BUSINESSDESCRIPTIONANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESIntangibleAssetsUsefulLivesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_bdc50f0f-61dd-4743-a3d0-cabcfb5b7a96" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_d90c5721-36fe-4f92-bf24-8500f5d345e2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_bdc50f0f-61dd-4743-a3d0-cabcfb5b7a96" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_d90c5721-36fe-4f92-bf24-8500f5d345e2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_49c7625c-383a-4370-a6e1-fc9531736ddf" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_d90c5721-36fe-4f92-bf24-8500f5d345e2" xlink:to="loc_srt_RangeAxis_49c7625c-383a-4370-a6e1-fc9531736ddf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_49c7625c-383a-4370-a6e1-fc9531736ddf_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_49c7625c-383a-4370-a6e1-fc9531736ddf" xlink:to="loc_srt_RangeMember_49c7625c-383a-4370-a6e1-fc9531736ddf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_90305bca-95f4-4980-b6c6-dc7cf5153d97" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_49c7625c-383a-4370-a6e1-fc9531736ddf" xlink:to="loc_srt_RangeMember_90305bca-95f4-4980-b6c6-dc7cf5153d97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_0e27da7b-dda7-4ce5-917c-aa3150e15e88" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_90305bca-95f4-4980-b6c6-dc7cf5153d97" xlink:to="loc_srt_MinimumMember_0e27da7b-dda7-4ce5-917c-aa3150e15e88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_e7cfae47-2faf-4e4e-bd7e-9044af10c138" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_90305bca-95f4-4980-b6c6-dc7cf5153d97" xlink:to="loc_srt_MaximumMember_e7cfae47-2faf-4e4e-bd7e-9044af10c138" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9c08db90-1164-414a-bb1e-79e42f141312" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_d90c5721-36fe-4f92-bf24-8500f5d345e2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9c08db90-1164-414a-bb1e-79e42f141312" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9c08db90-1164-414a-bb1e-79e42f141312_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9c08db90-1164-414a-bb1e-79e42f141312" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9c08db90-1164-414a-bb1e-79e42f141312_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4efc7fad-987a-4e34-8f8a-7405f1bba78e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9c08db90-1164-414a-bb1e-79e42f141312" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4efc7fad-987a-4e34-8f8a-7405f1bba78e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerListsMember_f0584394-916c-48ec-8cc6-9ba56aaf5198" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CustomerListsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4efc7fad-987a-4e34-8f8a-7405f1bba78e" xlink:to="loc_us-gaap_CustomerListsMember_f0584394-916c-48ec-8cc6-9ba56aaf5198" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_63c09d2c-cefd-4ca1-8f91-6f60e1c4d3a7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TrademarksAndTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4efc7fad-987a-4e34-8f8a-7405f1bba78e" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_63c09d2c-cefd-4ca1-8f91-6f60e1c4d3a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_6b5388d5-e0d9-4c5e-9b5a-0637e9b79528" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4efc7fad-987a-4e34-8f8a-7405f1bba78e" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_6b5388d5-e0d9-4c5e-9b5a-0637e9b79528" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_RegulatoryRegistrationCostsMember_35b9364c-a808-4777-aa21-f28fa868e678" xlink:href="bcpc-20241231.xsd#bcpc_RegulatoryRegistrationCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4efc7fad-987a-4e34-8f8a-7405f1bba78e" xlink:to="loc_bcpc_RegulatoryRegistrationCostsMember_35b9364c-a808-4777-aa21-f28fa868e678" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_PatentsTradeSecretsMember_e8ba695f-2937-4adf-979a-54f815ff88ba" xlink:href="bcpc-20241231.xsd#bcpc_PatentsTradeSecretsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4efc7fad-987a-4e34-8f8a-7405f1bba78e" xlink:to="loc_bcpc_PatentsTradeSecretsMember_e8ba695f-2937-4adf-979a-54f815ff88ba" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_OtherIntangibleAssetsExcludingRegulatoryRegistrationCostsAndPatentsTradeSecretsMember_d6f40748-3e34-44bc-8e18-e0c7ee92a81c" xlink:href="bcpc-20241231.xsd#bcpc_OtherIntangibleAssetsExcludingRegulatoryRegistrationCostsAndPatentsTradeSecretsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4efc7fad-987a-4e34-8f8a-7405f1bba78e" xlink:to="loc_bcpc_OtherIntangibleAssetsExcludingRegulatoryRegistrationCostsAndPatentsTradeSecretsMember_d6f40748-3e34-44bc-8e18-e0c7ee92a81c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_24e6d1bb-b20f-4c05-b8db-2b36a189efc3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_bdc50f0f-61dd-4743-a3d0-cabcfb5b7a96" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_24e6d1bb-b20f-4c05-b8db-2b36a189efc3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/SIGNIFICANTACQUISITIONSNarrativeDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#SIGNIFICANTACQUISITIONSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/SIGNIFICANTACQUISITIONSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11d63bff-6d07-412b-b324-68b939a9ebbb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11d63bff-6d07-412b-b324-68b939a9ebbb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_a0b77353-896a-4c8f-9cd3-83b1cc560112" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11d63bff-6d07-412b-b324-68b939a9ebbb" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_a0b77353-896a-4c8f-9cd3-83b1cc560112" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a0b77353-896a-4c8f-9cd3-83b1cc560112_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_a0b77353-896a-4c8f-9cd3-83b1cc560112" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a0b77353-896a-4c8f-9cd3-83b1cc560112_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_db11dd6f-383d-4ad6-8be8-7c4bbb570d45" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_a0b77353-896a-4c8f-9cd3-83b1cc560112" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_db11dd6f-383d-4ad6-8be8-7c4bbb570d45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_CardinalAssociatesIncBergstromMember_5fa49b55-fb29-4f81-8b25-e974eb70cf6d" xlink:href="bcpc-20241231.xsd#bcpc_CardinalAssociatesIncBergstromMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_db11dd6f-383d-4ad6-8be8-7c4bbb570d45" xlink:to="loc_bcpc_CardinalAssociatesIncBergstromMember_5fa49b55-fb29-4f81-8b25-e974eb70cf6d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_KechuBidCoASAndItsSubsidiaryCompaniesKappaMember_6d9261a4-91ed-4e47-9a3f-04c44de9c52c" xlink:href="bcpc-20241231.xsd#bcpc_KechuBidCoASAndItsSubsidiaryCompaniesKappaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_db11dd6f-383d-4ad6-8be8-7c4bbb570d45" xlink:to="loc_bcpc_KechuBidCoASAndItsSubsidiaryCompaniesKappaMember_6d9261a4-91ed-4e47-9a3f-04c44de9c52c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_67993d99-b8f6-4a01-b58d-b18793690b39" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11d63bff-6d07-412b-b324-68b939a9ebbb" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_67993d99-b8f6-4a01-b58d-b18793690b39" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_67993d99-b8f6-4a01-b58d-b18793690b39_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_67993d99-b8f6-4a01-b58d-b18793690b39" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_67993d99-b8f6-4a01-b58d-b18793690b39_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d33c8097-403b-42e2-9a9b-74304bc997fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_67993d99-b8f6-4a01-b58d-b18793690b39" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d33c8097-403b-42e2-9a9b-74304bc997fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_18dce24b-c9c5-467f-8052-cddffad7f709" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d33c8097-403b-42e2-9a9b-74304bc997fe" xlink:to="loc_us-gaap_CustomerRelationshipsMember_18dce24b-c9c5-467f-8052-cddffad7f709" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_CorporateTrademarkMember_fa85bea4-7d06-4ae4-ac6b-da32fd73abfc" xlink:href="bcpc-20241231.xsd#bcpc_CorporateTrademarkMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d33c8097-403b-42e2-9a9b-74304bc997fe" xlink:to="loc_bcpc_CorporateTrademarkMember_fa85bea4-7d06-4ae4-ac6b-da32fd73abfc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_ProductTrademarksMember_fe55c3b7-e7e5-4404-8315-20bfed22d16e" xlink:href="bcpc-20241231.xsd#bcpc_ProductTrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d33c8097-403b-42e2-9a9b-74304bc997fe" xlink:to="loc_bcpc_ProductTrademarksMember_fe55c3b7-e7e5-4404-8315-20bfed22d16e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_36223b03-d017-4ccf-911e-f1bd262c04e6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d33c8097-403b-42e2-9a9b-74304bc997fe" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_36223b03-d017-4ccf-911e-f1bd262c04e6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_c9285c47-9c9e-47fc-98de-7a753c9bb3a0" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11d63bff-6d07-412b-b324-68b939a9ebbb" xlink:to="loc_srt_CounterpartyNameAxis_c9285c47-9c9e-47fc-98de-7a753c9bb3a0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_c9285c47-9c9e-47fc-98de-7a753c9bb3a0_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_c9285c47-9c9e-47fc-98de-7a753c9bb3a0" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_c9285c47-9c9e-47fc-98de-7a753c9bb3a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3cca0f32-8df1-4458-abcd-04e49893f373" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_c9285c47-9c9e-47fc-98de-7a753c9bb3a0" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3cca0f32-8df1-4458-abcd-04e49893f373" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_FormerShareholdersMember_cc35de29-e744-43ee-a991-9b4b48c4fc6e" xlink:href="bcpc-20241231.xsd#bcpc_FormerShareholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3cca0f32-8df1-4458-abcd-04e49893f373" xlink:to="loc_bcpc_FormerShareholdersMember_cc35de29-e744-43ee-a991-9b4b48c4fc6e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_FormerShareholdersLendersAndCreditorsMember_1e51b184-9e3e-4f43-8098-61fdeb745131" xlink:href="bcpc-20241231.xsd#bcpc_FormerShareholdersLendersAndCreditorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_3cca0f32-8df1-4458-abcd-04e49893f373" xlink:to="loc_bcpc_FormerShareholdersLendersAndCreditorsMember_1e51b184-9e3e-4f43-8098-61fdeb745131" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_29c19f10-8f95-4861-9bf7-448ecffa4a7c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_11d63bff-6d07-412b-b324-68b939a9ebbb" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_29c19f10-8f95-4861-9bf7-448ecffa4a7c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_29c19f10-8f95-4861-9bf7-448ecffa4a7c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_29c19f10-8f95-4861-9bf7-448ecffa4a7c" xlink:to="loc_us-gaap_SegmentDomain_29c19f10-8f95-4861-9bf7-448ecffa4a7c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_044f0906-8842-46da-81b3-f1f9b838b023" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_29c19f10-8f95-4861-9bf7-448ecffa4a7c" xlink:to="loc_us-gaap_SegmentDomain_044f0906-8842-46da-81b3-f1f9b838b023" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_HumanNutritionAndHealthMember_60f32006-6c10-4684-a35c-d9995edbd6e3" xlink:href="bcpc-20241231.xsd#bcpc_HumanNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_044f0906-8842-46da-81b3-f1f9b838b023" xlink:to="loc_bcpc_HumanNutritionAndHealthMember_60f32006-6c10-4684-a35c-d9995edbd6e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_AnimalNutritionAndHealthMember_babfad7c-1c7c-4ebb-905f-54404ab67bff" xlink:href="bcpc-20241231.xsd#bcpc_AnimalNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_044f0906-8842-46da-81b3-f1f9b838b023" xlink:to="loc_bcpc_AnimalNutritionAndHealthMember_babfad7c-1c7c-4ebb-905f-54404ab67bff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_8624c39d-6240-4a09-a372-7655ceabbd44" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_8624c39d-6240-4a09-a372-7655ceabbd44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_BusinessCombinationConsiderationTransferredIncludingAdjustments_8f94ba4c-da40-423b-a4a8-1e2e884958f8" xlink:href="bcpc-20241231.xsd#bcpc_BusinessCombinationConsiderationTransferredIncludingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_bcpc_BusinessCombinationConsiderationTransferredIncludingAdjustments_8f94ba4c-da40-423b-a4a8-1e2e884958f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_7cb2d8bb-1ce3-4daa-bebf-879331b9171f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAcquiredFromAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_7cb2d8bb-1ce3-4daa-bebf-879331b9171f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_ce6a9c2a-546b-414b-93ff-642305ee78f2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_ce6a9c2a-546b-414b-93ff-642305ee78f2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_5c332120-2f47-443f-aeac-6f4c511f3c2f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_5c332120-2f47-443f-aeac-6f4c511f3c2f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_BusinessCombinationPostClosingPayment_76003b44-e6f1-4131-9a0e-7beeeab4b121" xlink:href="bcpc-20241231.xsd#bcpc_BusinessCombinationPostClosingPayment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_bcpc_BusinessCombinationPostClosingPayment_76003b44-e6f1-4131-9a0e-7beeeab4b121" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_ExpectedPaymentsToAcquireBusinessesIncludingContingentConsiderationGross_359a9b94-cd9b-479a-b508-11006a9b1e08" xlink:href="bcpc-20241231.xsd#bcpc_ExpectedPaymentsToAcquireBusinessesIncludingContingentConsiderationGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_bcpc_ExpectedPaymentsToAcquireBusinessesIncludingContingentConsiderationGross_359a9b94-cd9b-479a-b508-11006a9b1e08" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_528116a8-2bdd-4295-b306-77bb2606aadc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_528116a8-2bdd-4295-b306-77bb2606aadc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_83fe40c5-f435-48cd-a047-740443ede53b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_Goodwill_83fe40c5-f435-48cd-a047-740443ede53b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_GoodwillAcquiredDuringPeriodPercent_9eb0cdc8-393a-493b-b85b-cfb23d785459" xlink:href="bcpc-20241231.xsd#bcpc_GoodwillAcquiredDuringPeriodPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_bcpc_GoodwillAcquiredDuringPeriodPercent_9eb0cdc8-393a-493b-b85b-cfb23d785459" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_c0c3d950-b527-4d28-9e28-849acfff1b2e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_c0c3d950-b527-4d28-9e28-849acfff1b2e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_BusinessCombinationIntegrationRelatedCostsCredits_b197a1f6-54e4-4cde-80d2-c3a7b9e333ed" xlink:href="bcpc-20241231.xsd#bcpc_BusinessCombinationIntegrationRelatedCostsCredits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_bcpc_BusinessCombinationIntegrationRelatedCostsCredits_b197a1f6-54e4-4cde-80d2-c3a7b9e333ed" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsRelatedToPreviousPeriod_794f86f9-d759-4cf7-bd9f-38ce6f378f6b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsRelatedToPreviousPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentsRelatedToPreviousPeriod_794f86f9-d759-4cf7-bd9f-38ce6f378f6b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses_5c3b2cd3-ed97-4e6a-8f35-250b1eb9470e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses_5c3b2cd3-ed97-4e6a-8f35-250b1eb9470e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_PaymentsToAcquireBusinessesNetOfForeignCurrencyTranslationGainLoss_0f326955-8933-4ea0-86d1-a68f043e49d2" xlink:href="bcpc-20241231.xsd#bcpc_PaymentsToAcquireBusinessesNetOfForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_bcpc_PaymentsToAcquireBusinessesNetOfForeignCurrencyTranslationGainLoss_0f326955-8933-4ea0-86d1-a68f043e49d2" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities_bedfc9b2-0e98-4f01-b81a-0c31767b308f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_32e33b02-e884-4519-b38d-5deb2765c55f" xlink:to="loc_us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities_bedfc9b2-0e98-4f01-b81a-0c31767b308f" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/SIGNIFICANTACQUISITIONSFairValueofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#SIGNIFICANTACQUISITIONSFairValueofAssetsAcquiredandLiabilitiesAssumedDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/SIGNIFICANTACQUISITIONSFairValueofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_20c97d01-3215-4ebb-b897-718a855c5361" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_78c56fbd-17ab-4587-9ce9-cce99edf823c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_20c97d01-3215-4ebb-b897-718a855c5361" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_78c56fbd-17ab-4587-9ce9-cce99edf823c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_b2aa870c-7550-4306-84d4-ae75c25c29e8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_78c56fbd-17ab-4587-9ce9-cce99edf823c" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_b2aa870c-7550-4306-84d4-ae75c25c29e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b2aa870c-7550-4306-84d4-ae75c25c29e8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b2aa870c-7550-4306-84d4-ae75c25c29e8" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b2aa870c-7550-4306-84d4-ae75c25c29e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8743f71e-2a4b-4673-a36e-2299c4703dad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b2aa870c-7550-4306-84d4-ae75c25c29e8" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8743f71e-2a4b-4673-a36e-2299c4703dad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_CardinalAssociatesIncBergstromMember_71c6745a-9727-4442-8a46-da824cbeb63c" xlink:href="bcpc-20241231.xsd#bcpc_CardinalAssociatesIncBergstromMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8743f71e-2a4b-4673-a36e-2299c4703dad" xlink:to="loc_bcpc_CardinalAssociatesIncBergstromMember_71c6745a-9727-4442-8a46-da824cbeb63c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_KechuBidCoASAndItsSubsidiaryCompaniesKappaMember_a61af795-48f5-4a20-9fd8-ac45bee5c7c8" xlink:href="bcpc-20241231.xsd#bcpc_KechuBidCoASAndItsSubsidiaryCompaniesKappaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8743f71e-2a4b-4673-a36e-2299c4703dad" xlink:to="loc_bcpc_KechuBidCoASAndItsSubsidiaryCompaniesKappaMember_a61af795-48f5-4a20-9fd8-ac45bee5c7c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_e971a97d-643d-443d-9c2d-a64be6e71b01" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_78c56fbd-17ab-4587-9ce9-cce99edf823c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_e971a97d-643d-443d-9c2d-a64be6e71b01" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e971a97d-643d-443d-9c2d-a64be6e71b01_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_e971a97d-643d-443d-9c2d-a64be6e71b01" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e971a97d-643d-443d-9c2d-a64be6e71b01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f6830a35-f752-4f54-a5a1-0a6461daa4c3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_e971a97d-643d-443d-9c2d-a64be6e71b01" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f6830a35-f752-4f54-a5a1-0a6461daa4c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_ebc1d949-73e7-4f89-92ee-0bfb56309173" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f6830a35-f752-4f54-a5a1-0a6461daa4c3" xlink:to="loc_us-gaap_CustomerRelationshipsMember_ebc1d949-73e7-4f89-92ee-0bfb56309173" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_6802a13a-8196-4e98-ab9c-6708189623cc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f6830a35-f752-4f54-a5a1-0a6461daa4c3" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_6802a13a-8196-4e98-ab9c-6708189623cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksMember_7d83ed03-04d6-4000-abd2-1ceae077384f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f6830a35-f752-4f54-a5a1-0a6461daa4c3" xlink:to="loc_us-gaap_TrademarksMember_7d83ed03-04d6-4000-abd2-1ceae077384f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_1004bfc8-3695-413c-bc7a-2b0c16c5e479" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_78c56fbd-17ab-4587-9ce9-cce99edf823c" xlink:to="loc_srt_CounterpartyNameAxis_1004bfc8-3695-413c-bc7a-2b0c16c5e479" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_1004bfc8-3695-413c-bc7a-2b0c16c5e479_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_1004bfc8-3695-413c-bc7a-2b0c16c5e479" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_1004bfc8-3695-413c-bc7a-2b0c16c5e479_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_78d5a956-b395-4535-8448-98a76ab7f896" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_1004bfc8-3695-413c-bc7a-2b0c16c5e479" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_78d5a956-b395-4535-8448-98a76ab7f896" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_FormerShareholdersMember_58333ddb-2cff-46eb-b7a5-a72d8a2cdc05" xlink:href="bcpc-20241231.xsd#bcpc_FormerShareholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_78d5a956-b395-4535-8448-98a76ab7f896" xlink:to="loc_bcpc_FormerShareholdersMember_58333ddb-2cff-46eb-b7a5-a72d8a2cdc05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_FormerBankMember_e76b595b-3f73-421d-8475-bd2d8cc44349" xlink:href="bcpc-20241231.xsd#bcpc_FormerBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_78d5a956-b395-4535-8448-98a76ab7f896" xlink:to="loc_bcpc_FormerBankMember_e76b595b-3f73-421d-8475-bd2d8cc44349" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_FormerShareholdersLendersAndCreditorsMember_1f864dcf-4d0c-43a7-ac23-2f0a1d04a81e" xlink:href="bcpc-20241231.xsd#bcpc_FormerShareholdersLendersAndCreditorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_78d5a956-b395-4535-8448-98a76ab7f896" xlink:to="loc_bcpc_FormerShareholdersLendersAndCreditorsMember_1f864dcf-4d0c-43a7-ac23-2f0a1d04a81e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_20c97d01-3215-4ebb-b897-718a855c5361" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_34d25a57-f3c4-4598-b1c7-ef3f6327631d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_34d25a57-f3c4-4598-b1c7-ef3f6327631d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_b2ca99ae-d808-45b8-91eb-50048f49ab09" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_b2ca99ae-d808-45b8-91eb-50048f49ab09" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_decf430e-4397-4c7a-a6f9-6043efa135ff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_decf430e-4397-4c7a-a6f9-6043efa135ff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_d459623b-80b5-456e-82b0-bf1f26389732" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_d459623b-80b5-456e-82b0-bf1f26389732" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_BusinessCombinationRecognizedIdentifiableAssetsAcquiresAndLiabilitiesAssumedRightOfUseAssets_486ea7e7-3184-44e2-99a2-ca34f2ab7234" xlink:href="bcpc-20241231.xsd#bcpc_BusinessCombinationRecognizedIdentifiableAssetsAcquiresAndLiabilitiesAssumedRightOfUseAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_bcpc_BusinessCombinationRecognizedIdentifiableAssetsAcquiresAndLiabilitiesAssumedRightOfUseAssets_486ea7e7-3184-44e2-99a2-ca34f2ab7234" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_93e3d437-4ca6-4a97-954f-0ae0ec99835a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_93e3d437-4ca6-4a97-954f-0ae0ec99835a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_476813c6-4f5e-4f41-aff9-93f46aa95112" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_476813c6-4f5e-4f41-aff9-93f46aa95112" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_3674d15a-c283-4caf-a600-01d274c07227" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_3674d15a-c283-4caf-a600-01d274c07227" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_44fc6f38-f307-4f85-ae22-777d9295102c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_44fc6f38-f307-4f85-ae22-777d9295102c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLeaseLiabilities_b8bc2ded-9941-40e0-957d-bc65ff99677f" xlink:href="bcpc-20241231.xsd#bcpc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_bcpc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLeaseLiabilities_b8bc2ded-9941-40e0-957d-bc65ff99677f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_35324c02-67c9-499a-81cd-370aba72f0dd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_35324c02-67c9-499a-81cd-370aba72f0dd" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_ad662660-89ee-47d4-8ec3-8289292e602c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_ad662660-89ee-47d4-8ec3-8289292e602c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_7c1cd56b-eaed-45dd-b2b5-ae9b69ef0a50" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_Goodwill_7c1cd56b-eaed-45dd-b2b5-ae9b69ef0a50" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_9eede530-38a4-4e41-b9cf-f270911cce45" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_9eede530-38a4-4e41-b9cf-f270911cce45" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_3aa34571-7358-4b51-abfd-7372eddb80ac" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_3aa34571-7358-4b51-abfd-7372eddb80ac" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses_ea4265aa-f04f-4b74-9079-1ed8f98ea4b7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses_ea4265aa-f04f-4b74-9079-1ed8f98ea4b7" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_BusinessCombinationConsiderationTransferredIncludingAdjustments_5a79ab6c-2194-4209-a2e9-db40d5db875a" xlink:href="bcpc-20241231.xsd#bcpc_BusinessCombinationConsiderationTransferredIncludingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNetAbstract_fdb82086-f29e-49b0-a3df-98051c8f555e" xlink:to="loc_bcpc_BusinessCombinationConsiderationTransferredIncludingAdjustments_5a79ab6c-2194-4209-a2e9-db40d5db875a" xlink:type="arc" order="17"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/STOCKHOLDERSEQUITYScheduleofCompensationCostonNetEarningsDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#STOCKHOLDERSEQUITYScheduleofCompensationCostonNetEarningsDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/STOCKHOLDERSEQUITYScheduleofCompensationCostonNetEarningsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ed7d164c-20ea-41a9-a8f2-f56d18babfb6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_de704945-4b00-4557-a416-155b8a372d42" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ed7d164c-20ea-41a9-a8f2-f56d18babfb6" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_de704945-4b00-4557-a416-155b8a372d42" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_34e0b96b-00ff-4453-bbf8-1a070c29e526" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_de704945-4b00-4557-a416-155b8a372d42" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_34e0b96b-00ff-4453-bbf8-1a070c29e526" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_34e0b96b-00ff-4453-bbf8-1a070c29e526_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_34e0b96b-00ff-4453-bbf8-1a070c29e526" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_34e0b96b-00ff-4453-bbf8-1a070c29e526_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_f4353427-ffd8-42dd-ad40-8058694909aa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_34e0b96b-00ff-4453-bbf8-1a070c29e526" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_f4353427-ffd8-42dd-ad40-8058694909aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_ca3f3625-da96-463b-a006-b971759ec163" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_f4353427-ffd8-42dd-ad40-8058694909aa" xlink:to="loc_us-gaap_CostOfSalesMember_ca3f3625-da96-463b-a006-b971759ec163" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenseMember_9d56402c-a321-437d-96dc-6e108c79e367" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_f4353427-ffd8-42dd-ad40-8058694909aa" xlink:to="loc_us-gaap_OperatingExpenseMember_9d56402c-a321-437d-96dc-6e108c79e367" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_d3f95e8b-ea6e-4c98-93ea-c7c229ae149e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ed7d164c-20ea-41a9-a8f2-f56d18babfb6" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_d3f95e8b-ea6e-4c98-93ea-c7c229ae149e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_ec992de3-a736-4fb7-93e6-c8c274433f9e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ed7d164c-20ea-41a9-a8f2-f56d18babfb6" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_ec992de3-a736-4fb7-93e6-c8c274433f9e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/STOCKHOLDERSEQUITYStockbasedCompensationDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#STOCKHOLDERSEQUITYStockbasedCompensationDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/STOCKHOLDERSEQUITYStockbasedCompensationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bcc88e65-4887-4578-a72e-2fc45cd4c5cb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_503e9d95-6d86-451f-b22a-6e4b26459c5e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bcc88e65-4887-4578-a72e-2fc45cd4c5cb" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_503e9d95-6d86-451f-b22a-6e4b26459c5e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_aa11e20a-0177-465d-86ff-718b1a081536" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_503e9d95-6d86-451f-b22a-6e4b26459c5e" xlink:to="loc_us-gaap_PlanNameAxis_aa11e20a-0177-465d-86ff-718b1a081536" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_aa11e20a-0177-465d-86ff-718b1a081536_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_aa11e20a-0177-465d-86ff-718b1a081536" xlink:to="loc_us-gaap_PlanNameDomain_aa11e20a-0177-465d-86ff-718b1a081536_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_79459a93-be58-4d11-8bdf-e81ed940d4bd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_aa11e20a-0177-465d-86ff-718b1a081536" xlink:to="loc_us-gaap_PlanNameDomain_79459a93-be58-4d11-8bdf-e81ed940d4bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_OmnibusIncentivePlan2017Member_89435682-ff92-4b2e-91e4-bcaee4ff5bb8" xlink:href="bcpc-20241231.xsd#bcpc_OmnibusIncentivePlan2017Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_79459a93-be58-4d11-8bdf-e81ed940d4bd" xlink:to="loc_bcpc_OmnibusIncentivePlan2017Member_89435682-ff92-4b2e-91e4-bcaee4ff5bb8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_8ef61f5b-4d26-45bc-8635-ee2c2f3b003f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_503e9d95-6d86-451f-b22a-6e4b26459c5e" xlink:to="loc_us-gaap_AwardTypeAxis_8ef61f5b-4d26-45bc-8635-ee2c2f3b003f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ef61f5b-4d26-45bc-8635-ee2c2f3b003f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_8ef61f5b-4d26-45bc-8635-ee2c2f3b003f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ef61f5b-4d26-45bc-8635-ee2c2f3b003f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5cf58828-7605-4fc8-ac54-dc7b0c33c270" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_8ef61f5b-4d26-45bc-8635-ee2c2f3b003f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5cf58828-7605-4fc8-ac54-dc7b0c33c270" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_3218e38d-177d-49e0-b4f3-7adce83ab9fd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5cf58828-7605-4fc8-ac54-dc7b0c33c270" xlink:to="loc_us-gaap_EmployeeStockOptionMember_3218e38d-177d-49e0-b4f3-7adce83ab9fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_ad09a92e-ed00-4382-a5b7-bcd90d0bcb4a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5cf58828-7605-4fc8-ac54-dc7b0c33c270" xlink:to="loc_us-gaap_PerformanceSharesMember_ad09a92e-ed00-4382-a5b7-bcd90d0bcb4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusAxis_55c6e012-e4e2-486e-99de-0aeafcbafd7d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GranteeStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_503e9d95-6d86-451f-b22a-6e4b26459c5e" xlink:to="loc_us-gaap_GranteeStatusAxis_55c6e012-e4e2-486e-99de-0aeafcbafd7d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_55c6e012-e4e2-486e-99de-0aeafcbafd7d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GranteeStatusAxis_55c6e012-e4e2-486e-99de-0aeafcbafd7d" xlink:to="loc_us-gaap_GranteeStatusDomain_55c6e012-e4e2-486e-99de-0aeafcbafd7d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_680286fe-38eb-44d5-af75-41c3694d5757" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GranteeStatusAxis_55c6e012-e4e2-486e-99de-0aeafcbafd7d" xlink:to="loc_us-gaap_GranteeStatusDomain_680286fe-38eb-44d5-af75-41c3694d5757" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedPaymentArrangementNonemployeeMember_87b81dd5-a588-4d7a-b892-24f0acc11951" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedPaymentArrangementNonemployeeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_680286fe-38eb-44d5-af75-41c3694d5757" xlink:to="loc_us-gaap_ShareBasedPaymentArrangementNonemployeeMember_87b81dd5-a588-4d7a-b892-24f0acc11951" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_NumberOfShareBasedCompensationPlans_07a6862b-d55c-4aec-943e-963b28c9ff0b" xlink:href="bcpc-20241231.xsd#bcpc_NumberOfShareBasedCompensationPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bcc88e65-4887-4578-a72e-2fc45cd4c5cb" xlink:to="loc_bcpc_NumberOfShareBasedCompensationPlans_07a6862b-d55c-4aec-943e-963b28c9ff0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_bda56e0f-0d09-4731-8681-280845f2dcf1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bcc88e65-4887-4578-a72e-2fc45cd4c5cb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_bda56e0f-0d09-4731-8681-280845f2dcf1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_f4c9d1b5-c1e6-41d1-9152-e23e9d202a17" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bcc88e65-4887-4578-a72e-2fc45cd4c5cb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_f4c9d1b5-c1e6-41d1-9152-e23e9d202a17" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_58603eb4-3220-4376-a9e1-81161520c769" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bcc88e65-4887-4578-a72e-2fc45cd4c5cb" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_58603eb4-3220-4376-a9e1-81161520c769" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_a0e2b6ef-3241-49d8-844d-84e7c2606e0e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bcc88e65-4887-4578-a72e-2fc45cd4c5cb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_a0e2b6ef-3241-49d8-844d-84e7c2606e0e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_SharesPurchasedUnderRestrictedStockPurchaseAgreementsMinimum_8fbcc927-7dff-418e-be63-d69e6941adda" xlink:href="bcpc-20241231.xsd#bcpc_SharesPurchasedUnderRestrictedStockPurchaseAgreementsMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bcc88e65-4887-4578-a72e-2fc45cd4c5cb" xlink:to="loc_bcpc_SharesPurchasedUnderRestrictedStockPurchaseAgreementsMinimum_8fbcc927-7dff-418e-be63-d69e6941adda" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_SharesPurchasedUnderRestrictedStockPurchaseAgreementsMaximum_a3a7f21b-5e3a-41bf-bf14-449387f74a74" xlink:href="bcpc-20241231.xsd#bcpc_SharesPurchasedUnderRestrictedStockPurchaseAgreementsMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bcc88e65-4887-4578-a72e-2fc45cd4c5cb" xlink:to="loc_bcpc_SharesPurchasedUnderRestrictedStockPurchaseAgreementsMaximum_a3a7f21b-5e3a-41bf-bf14-449387f74a74" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_6ce2ca50-782d-4695-a91a-d30dc94819dd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bcc88e65-4887-4578-a72e-2fc45cd4c5cb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_6ce2ca50-782d-4695-a91a-d30dc94819dd" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/STOCKHOLDERSEQUITYAssumptionsUsedinFairValueDeterminationDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#STOCKHOLDERSEQUITYAssumptionsUsedinFairValueDeterminationDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/STOCKHOLDERSEQUITYAssumptionsUsedinFairValueDeterminationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_459a9dcf-a030-44e7-9758-6e6a58ce56f3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5858e2a0-9f13-43e5-93fc-6fc494e7cbfe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_459a9dcf-a030-44e7-9758-6e6a58ce56f3" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5858e2a0-9f13-43e5-93fc-6fc494e7cbfe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_758d45a0-1033-48fa-8359-de6a1bafa950" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5858e2a0-9f13-43e5-93fc-6fc494e7cbfe" xlink:to="loc_us-gaap_AwardTypeAxis_758d45a0-1033-48fa-8359-de6a1bafa950" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_758d45a0-1033-48fa-8359-de6a1bafa950_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_758d45a0-1033-48fa-8359-de6a1bafa950" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_758d45a0-1033-48fa-8359-de6a1bafa950_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d7b6d7ed-6060-4557-a3a3-19b27e1ec35b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_758d45a0-1033-48fa-8359-de6a1bafa950" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d7b6d7ed-6060-4557-a3a3-19b27e1ec35b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_b1ac0f9d-5e7b-44e5-bcd3-3940e8a1f93e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d7b6d7ed-6060-4557-a3a3-19b27e1ec35b" xlink:to="loc_us-gaap_EmployeeStockOptionMember_b1ac0f9d-5e7b-44e5-bcd3-3940e8a1f93e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_359a428d-75b6-42e6-8c71-fd8d6135bba9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d7b6d7ed-6060-4557-a3a3-19b27e1ec35b" xlink:to="loc_us-gaap_PerformanceSharesMember_359a428d-75b6-42e6-8c71-fd8d6135bba9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_1f377c45-cd45-4c6a-9d8d-b87306f942dc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d7b6d7ed-6060-4557-a3a3-19b27e1ec35b" xlink:to="loc_us-gaap_RestrictedStockMember_1f377c45-cd45-4c6a-9d8d-b87306f942dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_3b8f8f23-bcef-4cc9-bfd0-43761d98e504" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5858e2a0-9f13-43e5-93fc-6fc494e7cbfe" xlink:to="loc_srt_RangeAxis_3b8f8f23-bcef-4cc9-bfd0-43761d98e504" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_3b8f8f23-bcef-4cc9-bfd0-43761d98e504_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_3b8f8f23-bcef-4cc9-bfd0-43761d98e504" xlink:to="loc_srt_RangeMember_3b8f8f23-bcef-4cc9-bfd0-43761d98e504_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_0e143c67-d187-42d4-b415-653deea6d6e9" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_3b8f8f23-bcef-4cc9-bfd0-43761d98e504" xlink:to="loc_srt_RangeMember_0e143c67-d187-42d4-b415-653deea6d6e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_ef2bcd11-a06f-4de5-a3ba-37e61d828975" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0e143c67-d187-42d4-b415-653deea6d6e9" xlink:to="loc_srt_MinimumMember_ef2bcd11-a06f-4de5-a3ba-37e61d828975" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_a0531817-519c-4150-86f5-25334cd9ccdc" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_0e143c67-d187-42d4-b415-653deea6d6e9" xlink:to="loc_srt_MaximumMember_a0531817-519c-4150-86f5-25334cd9ccdc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusAxis_357c3ac9-348d-4db8-a9ee-890aa3051084" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GranteeStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5858e2a0-9f13-43e5-93fc-6fc494e7cbfe" xlink:to="loc_us-gaap_GranteeStatusAxis_357c3ac9-348d-4db8-a9ee-890aa3051084" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_357c3ac9-348d-4db8-a9ee-890aa3051084_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GranteeStatusAxis_357c3ac9-348d-4db8-a9ee-890aa3051084" xlink:to="loc_us-gaap_GranteeStatusDomain_357c3ac9-348d-4db8-a9ee-890aa3051084_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_93e2a2ca-b33a-47ca-a292-420a917876c9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GranteeStatusAxis_357c3ac9-348d-4db8-a9ee-890aa3051084" xlink:to="loc_us-gaap_GranteeStatusDomain_93e2a2ca-b33a-47ca-a292-420a917876c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedPaymentArrangementEmployeeMember_96c2bdee-d21d-44ad-8e39-55767df2d3c6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedPaymentArrangementEmployeeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_93e2a2ca-b33a-47ca-a292-420a917876c9" xlink:to="loc_us-gaap_ShareBasedPaymentArrangementEmployeeMember_96c2bdee-d21d-44ad-8e39-55767df2d3c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedPaymentArrangementNonemployeeMember_af895935-bf52-4516-b117-ce6e9925346f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedPaymentArrangementNonemployeeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_93e2a2ca-b33a-47ca-a292-420a917876c9" xlink:to="loc_us-gaap_ShareBasedPaymentArrangementNonemployeeMember_af895935-bf52-4516-b117-ce6e9925346f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_1287f72e-5d93-4c29-b053-4d651e5b4a49" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_459a9dcf-a030-44e7-9758-6e6a58ce56f3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_1287f72e-5d93-4c29-b053-4d651e5b4a49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_41f4b07d-77c2-4fe5-b01b-1d8b25fb4c30" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_1287f72e-5d93-4c29-b053-4d651e5b4a49" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_41f4b07d-77c2-4fe5-b01b-1d8b25fb4c30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_ee96e06b-5604-4953-b1aa-6b62da1b3f45" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_1287f72e-5d93-4c29-b053-4d651e5b4a49" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_ee96e06b-5604-4953-b1aa-6b62da1b3f45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_df7784b8-8416-4ccf-b27f-539744bd151f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_1287f72e-5d93-4c29-b053-4d651e5b4a49" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_df7784b8-8416-4ccf-b27f-539744bd151f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_d4c496fd-834a-45a1-947c-724392bef246" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_1287f72e-5d93-4c29-b053-4d651e5b4a49" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_d4c496fd-834a-45a1-947c-724392bef246" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_InitialTotalShareholderReturnPercentage_cad88b69-2282-4932-b2de-3c73b2dbdfd8" xlink:href="bcpc-20241231.xsd#bcpc_InitialTotalShareholderReturnPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_459a9dcf-a030-44e7-9758-6e6a58ce56f3" xlink:to="loc_bcpc_InitialTotalShareholderReturnPercentage_cad88b69-2282-4932-b2de-3c73b2dbdfd8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_5df06608-62ab-45d7-880c-481b89532229" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_459a9dcf-a030-44e7-9758-6e6a58ce56f3" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_5df06608-62ab-45d7-880c-481b89532229" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_7fd4b0e2-8e08-464a-b4bd-3fdc71e4e400" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_459a9dcf-a030-44e7-9758-6e6a58ce56f3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_7fd4b0e2-8e08-464a-b4bd-3fdc71e4e400" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/STOCKHOLDERSEQUITYInformationRelatedtoStockOptionsOutstandingDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#STOCKHOLDERSEQUITYInformationRelatedtoStockOptionsOutstandingDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/STOCKHOLDERSEQUITYInformationRelatedtoStockOptionsOutstandingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_4a209b92-589e-4b97-b48e-73a8ef884b3b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_ea45d796-8e12-4231-a5af-96a226bef801" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_4a209b92-589e-4b97-b48e-73a8ef884b3b" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_ea45d796-8e12-4231-a5af-96a226bef801" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_f2e54aee-ccea-4498-ba9c-cb433edf65f1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_ea45d796-8e12-4231-a5af-96a226bef801" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_f2e54aee-ccea-4498-ba9c-cb433edf65f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_f2e54aee-ccea-4498-ba9c-cb433edf65f1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_f2e54aee-ccea-4498-ba9c-cb433edf65f1" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_f2e54aee-ccea-4498-ba9c-cb433edf65f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_e9811df4-3cfa-4d11-93c9-933ac9c09f90" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_f2e54aee-ccea-4498-ba9c-cb433edf65f1" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_e9811df4-3cfa-4d11-93c9-933ac9c09f90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_ExercisePriceRange1Member_e8b2f63a-a7eb-4b6d-aca7-3597ea838e07" xlink:href="bcpc-20241231.xsd#bcpc_ExercisePriceRange1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_e9811df4-3cfa-4d11-93c9-933ac9c09f90" xlink:to="loc_bcpc_ExercisePriceRange1Member_e8b2f63a-a7eb-4b6d-aca7-3597ea838e07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_ExercisePriceRange2Member_384365d8-185e-4b4b-affb-b59c52682ada" xlink:href="bcpc-20241231.xsd#bcpc_ExercisePriceRange2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_e9811df4-3cfa-4d11-93c9-933ac9c09f90" xlink:to="loc_bcpc_ExercisePriceRange2Member_384365d8-185e-4b4b-affb-b59c52682ada" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_ExercisePriceRange3Member_bee14db5-710e-400d-8a84-2c8344606561" xlink:href="bcpc-20241231.xsd#bcpc_ExercisePriceRange3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_e9811df4-3cfa-4d11-93c9-933ac9c09f90" xlink:to="loc_bcpc_ExercisePriceRange3Member_bee14db5-710e-400d-8a84-2c8344606561" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_b391d44b-8224-4ff6-aa7c-087d29d5a7ad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_4a209b92-589e-4b97-b48e-73a8ef884b3b" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_b391d44b-8224-4ff6-aa7c-087d29d5a7ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_deff3c7a-dd56-4491-be7b-0181c6eb9d81" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_4a209b92-589e-4b97-b48e-73a8ef884b3b" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_deff3c7a-dd56-4491-be7b-0181c6eb9d81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_8982667b-72f1-43ae-b69f-7262532166e4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_4a209b92-589e-4b97-b48e-73a8ef884b3b" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_8982667b-72f1-43ae-b69f-7262532166e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_c19c9a7b-8629-40db-857d-3079ff6fd2c1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_4a209b92-589e-4b97-b48e-73a8ef884b3b" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_c19c9a7b-8629-40db-857d-3079ff6fd2c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_a4ed7176-19ca-44aa-afb9-21ee5ea4b3e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_4a209b92-589e-4b97-b48e-73a8ef884b3b" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_a4ed7176-19ca-44aa-afb9-21ee5ea4b3e3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_4db151dd-a96f-42c7-a848-c1672ad73fac" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_4a209b92-589e-4b97-b48e-73a8ef884b3b" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_4db151dd-a96f-42c7-a848-c1672ad73fac" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_638c1216-8c0b-49f9-9f8e-d865145dad89" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_4a209b92-589e-4b97-b48e-73a8ef884b3b" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_638c1216-8c0b-49f9-9f8e-d865145dad89" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/STOCKHOLDERSEQUITYRestrictedStockandPerformanceShareActivityDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#STOCKHOLDERSEQUITYRestrictedStockandPerformanceShareActivityDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/STOCKHOLDERSEQUITYRestrictedStockandPerformanceShareActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d114d317-4eee-4f86-ba2e-ffb7440f3d8e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c3b81b2e-7f45-4d02-8cf2-f3db3e1ac3b3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d114d317-4eee-4f86-ba2e-ffb7440f3d8e" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c3b81b2e-7f45-4d02-8cf2-f3db3e1ac3b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_03df5bde-4769-4e83-b07c-50ec992e4601" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c3b81b2e-7f45-4d02-8cf2-f3db3e1ac3b3" xlink:to="loc_us-gaap_AwardTypeAxis_03df5bde-4769-4e83-b07c-50ec992e4601" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_03df5bde-4769-4e83-b07c-50ec992e4601_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_03df5bde-4769-4e83-b07c-50ec992e4601" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_03df5bde-4769-4e83-b07c-50ec992e4601_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04b6dba4-98f0-4f31-b0be-273cfc284185" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_03df5bde-4769-4e83-b07c-50ec992e4601" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04b6dba4-98f0-4f31-b0be-273cfc284185" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_b234f47b-ca6e-4f5d-b184-7ab49daa107e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04b6dba4-98f0-4f31-b0be-273cfc284185" xlink:to="loc_us-gaap_RestrictedStockMember_b234f47b-ca6e-4f5d-b184-7ab49daa107e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_7fac312f-6435-4561-a8dc-5207cfd1e4b1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04b6dba4-98f0-4f31-b0be-273cfc284185" xlink:to="loc_us-gaap_PerformanceSharesMember_7fac312f-6435-4561-a8dc-5207cfd1e4b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_0d31ab59-1c66-4715-b572-5ffa93fa1c1d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d114d317-4eee-4f86-ba2e-ffb7440f3d8e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_0d31ab59-1c66-4715-b572-5ffa93fa1c1d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ee6d9c7c-14d4-44ed-8b34-bd4841dd44e7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_0d31ab59-1c66-4715-b572-5ffa93fa1c1d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ee6d9c7c-14d4-44ed-8b34-bd4841dd44e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_e23cffbe-5090-4a9f-98a0-ab174d889f68" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_0d31ab59-1c66-4715-b572-5ffa93fa1c1d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_e23cffbe-5090-4a9f-98a0-ab174d889f68" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_993e129b-c25b-4a97-ab7e-fdcccd904a60" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_0d31ab59-1c66-4715-b572-5ffa93fa1c1d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_993e129b-c25b-4a97-ab7e-fdcccd904a60" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d0eb32f9-7db3-48d2-a3ea-4cea7e3620d5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_0d31ab59-1c66-4715-b572-5ffa93fa1c1d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_d0eb32f9-7db3-48d2-a3ea-4cea7e3620d5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_83f16ac4-fe19-45d3-a021-77e68668c68b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2bdaa0e7-f394-4e82-9edb-5f842b304abb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d114d317-4eee-4f86-ba2e-ffb7440f3d8e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2bdaa0e7-f394-4e82-9edb-5f842b304abb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_3a148fea-0966-4f63-a195-1f872f9f506a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2bdaa0e7-f394-4e82-9edb-5f842b304abb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_3a148fea-0966-4f63-a195-1f872f9f506a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_bab31780-c418-4af3-9247-9b291eff8d58" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2bdaa0e7-f394-4e82-9edb-5f842b304abb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_bab31780-c418-4af3-9247-9b291eff8d58" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_a6273b44-c346-4b85-b9c4-d09fc69e9c70" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2bdaa0e7-f394-4e82-9edb-5f842b304abb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_a6273b44-c346-4b85-b9c4-d09fc69e9c70" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_d0f3cfc2-03b1-489b-8106-fb4af6ba59a2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2bdaa0e7-f394-4e82-9edb-5f842b304abb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_d0f3cfc2-03b1-489b-8106-fb4af6ba59a2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_3c8da4c3-2ebf-4544-99e0-8a0c1951190e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_690934be-3155-471b-8210-41c5c92eec34" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d114d317-4eee-4f86-ba2e-ffb7440f3d8e" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_690934be-3155-471b-8210-41c5c92eec34" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_d71012ab-6860-4cdb-8d64-c7baf654b801" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d114d317-4eee-4f86-ba2e-ffb7440f3d8e" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_d71012ab-6860-4cdb-8d64-c7baf654b801" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_EstimatedShareBasedCompensationExpenseCurrentFiscalYear_6fc91ee2-0a9c-4734-8fa6-4823fe0b2b42" xlink:href="bcpc-20241231.xsd#bcpc_EstimatedShareBasedCompensationExpenseCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d114d317-4eee-4f86-ba2e-ffb7440f3d8e" xlink:to="loc_bcpc_EstimatedShareBasedCompensationExpenseCurrentFiscalYear_6fc91ee2-0a9c-4734-8fa6-4823fe0b2b42" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/PROPERTYPLANTANDEQUIPMENTScheduleofPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#PROPERTYPLANTANDEQUIPMENTScheduleofPropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/PROPERTYPLANTANDEQUIPMENTScheduleofPropertyPlantandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_88fb780e-5532-4f10-88cf-d2bf3f296c04" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_9aeb2ac0-3761-49c9-aaff-d498cff86770" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_88fb780e-5532-4f10-88cf-d2bf3f296c04" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_9aeb2ac0-3761-49c9-aaff-d498cff86770" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b97bc5e0-2156-4901-9fb4-14c32e479da8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_9aeb2ac0-3761-49c9-aaff-d498cff86770" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b97bc5e0-2156-4901-9fb4-14c32e479da8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b97bc5e0-2156-4901-9fb4-14c32e479da8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b97bc5e0-2156-4901-9fb4-14c32e479da8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b97bc5e0-2156-4901-9fb4-14c32e479da8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_dd7c479d-310a-4e9b-bd72-c48ac90e1b0e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b97bc5e0-2156-4901-9fb4-14c32e479da8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_dd7c479d-310a-4e9b-bd72-c48ac90e1b0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_7252d3d5-a54e-4e56-a4f4-cd0428d50fe1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_dd7c479d-310a-4e9b-bd72-c48ac90e1b0e" xlink:to="loc_us-gaap_LandMember_7252d3d5-a54e-4e56-a4f4-cd0428d50fe1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_2b3216ca-8850-45db-a0d8-1a57923c62a1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_dd7c479d-310a-4e9b-bd72-c48ac90e1b0e" xlink:to="loc_us-gaap_BuildingMember_2b3216ca-8850-45db-a0d8-1a57923c62a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquipmentMember_401cc7d6-d680-4452-b4f0-6b9e73b8baa6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_dd7c479d-310a-4e9b-bd72-c48ac90e1b0e" xlink:to="loc_us-gaap_EquipmentMember_401cc7d6-d680-4452-b4f0-6b9e73b8baa6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_44216c12-1204-425b-9973-e63eee6a44ee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_dd7c479d-310a-4e9b-bd72-c48ac90e1b0e" xlink:to="loc_us-gaap_ConstructionInProgressMember_44216c12-1204-425b-9973-e63eee6a44ee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_e9a198da-c18e-4763-91f2-4f0da35d1d0a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_88fb780e-5532-4f10-88cf-d2bf3f296c04" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_e9a198da-c18e-4763-91f2-4f0da35d1d0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_2188fd65-cb1b-444d-8ef7-500c6f274056" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_88fb780e-5532-4f10-88cf-d2bf3f296c04" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_2188fd65-cb1b-444d-8ef7-500c6f274056" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_9f03f3ea-7c32-4f5f-b61e-21b571cd7de3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_88fb780e-5532-4f10-88cf-d2bf3f296c04" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_9f03f3ea-7c32-4f5f-b61e-21b571cd7de3" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/PROPERTYPLANTANDEQUIPMENTLongLivedAssetsbyGeographicalAreaDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#PROPERTYPLANTANDEQUIPMENTLongLivedAssetsbyGeographicalAreaDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/PROPERTYPLANTANDEQUIPMENTLongLivedAssetsbyGeographicalAreaDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_bede834c-08d8-43b8-8a4b-a72e16da9f5f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_1563ebbf-0e0e-4cdc-8840-70d6fff85957" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_bede834c-08d8-43b8-8a4b-a72e16da9f5f" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_1563ebbf-0e0e-4cdc-8840-70d6fff85957" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_d686678d-da31-49e8-9924-1f99960d8ca1" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_1563ebbf-0e0e-4cdc-8840-70d6fff85957" xlink:to="loc_srt_StatementGeographicalAxis_d686678d-da31-49e8-9924-1f99960d8ca1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_d686678d-da31-49e8-9924-1f99960d8ca1_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_d686678d-da31-49e8-9924-1f99960d8ca1" xlink:to="loc_srt_SegmentGeographicalDomain_d686678d-da31-49e8-9924-1f99960d8ca1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_1e80d9de-7b12-413b-8825-dd1a00a3a0ae" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_d686678d-da31-49e8-9924-1f99960d8ca1" xlink:to="loc_srt_SegmentGeographicalDomain_1e80d9de-7b12-413b-8825-dd1a00a3a0ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NorthAmericaMember_7393953b-23e5-4d83-99a6-8935f7e69b13" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_NorthAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1e80d9de-7b12-413b-8825-dd1a00a3a0ae" xlink:to="loc_srt_NorthAmericaMember_7393953b-23e5-4d83-99a6-8935f7e69b13" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_a0e9efd8-5a6e-4ad1-893f-76c4b5409f9b" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1e80d9de-7b12-413b-8825-dd1a00a3a0ae" xlink:to="loc_srt_EuropeMember_a0e9efd8-5a6e-4ad1-893f-76c4b5409f9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_e4e5f68f-ed69-4e9e-9f35-bb0837842516" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_bede834c-08d8-43b8-8a4b-a72e16da9f5f" xlink:to="loc_us-gaap_NoncurrentAssets_e4e5f68f-ed69-4e9e-9f35-bb0837842516" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/INTANGIBLEASSETSGoodwillDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#INTANGIBLEASSETSGoodwillDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/INTANGIBLEASSETSGoodwillDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_70ec78a3-620d-45e9-9711-9e7a62e7346d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_9e43fe18-0ab7-4a8f-a052-721ef8be8838" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_70ec78a3-620d-45e9-9711-9e7a62e7346d" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_9e43fe18-0ab7-4a8f-a052-721ef8be8838" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_aa5d98d5-35f5-440c-8ccb-874f03589d55" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_9e43fe18-0ab7-4a8f-a052-721ef8be8838" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_aa5d98d5-35f5-440c-8ccb-874f03589d55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_aa5d98d5-35f5-440c-8ccb-874f03589d55_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_aa5d98d5-35f5-440c-8ccb-874f03589d55" xlink:to="loc_us-gaap_SegmentDomain_aa5d98d5-35f5-440c-8ccb-874f03589d55_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a8f728a7-c1b8-4730-afd3-a6cd9e7fb69e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_aa5d98d5-35f5-440c-8ccb-874f03589d55" xlink:to="loc_us-gaap_SegmentDomain_a8f728a7-c1b8-4730-afd3-a6cd9e7fb69e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_HumanNutritionAndHealthMember_f9b0cc6e-2f9a-4751-aa5d-2a2336af1aeb" xlink:href="bcpc-20241231.xsd#bcpc_HumanNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a8f728a7-c1b8-4730-afd3-a6cd9e7fb69e" xlink:to="loc_bcpc_HumanNutritionAndHealthMember_f9b0cc6e-2f9a-4751-aa5d-2a2336af1aeb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_AnimalNutritionAndHealthMember_73103df8-6d8f-47d4-bf42-ecc6ec22a572" xlink:href="bcpc-20241231.xsd#bcpc_AnimalNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a8f728a7-c1b8-4730-afd3-a6cd9e7fb69e" xlink:to="loc_bcpc_AnimalNutritionAndHealthMember_73103df8-6d8f-47d4-bf42-ecc6ec22a572" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_SpecialtyProductsMember_a307b82a-8ab4-4b8b-85f6-5e34698b4d3e" xlink:href="bcpc-20241231.xsd#bcpc_SpecialtyProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a8f728a7-c1b8-4730-afd3-a6cd9e7fb69e" xlink:to="loc_bcpc_SpecialtyProductsMember_a307b82a-8ab4-4b8b-85f6-5e34698b4d3e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_IndustrialProductsMember_48b7d467-d410-41cd-8903-698036e04db4" xlink:href="bcpc-20241231.xsd#bcpc_IndustrialProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a8f728a7-c1b8-4730-afd3-a6cd9e7fb69e" xlink:to="loc_bcpc_IndustrialProductsMember_48b7d467-d410-41cd-8903-698036e04db4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_455bb77b-5b86-40cc-878a-c31b1c310182" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_70ec78a3-620d-45e9-9711-9e7a62e7346d" xlink:to="loc_us-gaap_GoodwillRollForward_455bb77b-5b86-40cc-878a-c31b1c310182" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_b87ba4d2-2467-43b3-a044-8ab75167ba81" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_455bb77b-5b86-40cc-878a-c31b1c310182" xlink:to="loc_us-gaap_Goodwill_b87ba4d2-2467-43b3-a044-8ab75167ba81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_fd65fad3-b69c-45b6-9614-2c0506bfedaa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_455bb77b-5b86-40cc-878a-c31b1c310182" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_fd65fad3-b69c-45b6-9614-2c0506bfedaa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_ee4cbc94-678b-4eba-8cec-705952d9a22a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_455bb77b-5b86-40cc-878a-c31b1c310182" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_ee4cbc94-678b-4eba-8cec-705952d9a22a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_f8ddd59c-cac3-4a0f-81ed-ae9b01a0d45d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_7e767b20-c12b-45bb-89da-5547f64d0c80" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Goodwill"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/INTANGIBLEASSETSScheduleofIntangibleAssetsEstimatedUsefulLivesDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#INTANGIBLEASSETSScheduleofIntangibleAssetsEstimatedUsefulLivesDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/INTANGIBLEASSETSScheduleofIntangibleAssetsEstimatedUsefulLivesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_e49456b4-eb9b-45a8-89be-9dfc30db7690" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_8cd68c47-e513-422e-88bf-eb0f6d516a13" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_e49456b4-eb9b-45a8-89be-9dfc30db7690" xlink:to="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_8cd68c47-e513-422e-88bf-eb0f6d516a13" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c3015813-c273-4981-92c5-7976424ae8f6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_8cd68c47-e513-422e-88bf-eb0f6d516a13" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c3015813-c273-4981-92c5-7976424ae8f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c3015813-c273-4981-92c5-7976424ae8f6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c3015813-c273-4981-92c5-7976424ae8f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c3015813-c273-4981-92c5-7976424ae8f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb038a4-3833-42fa-95ae-1a9383a646aa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c3015813-c273-4981-92c5-7976424ae8f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb038a4-3833-42fa-95ae-1a9383a646aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerListsMember_0280cb4d-784c-4d5e-8ba1-b7b54abaa0e0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CustomerListsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb038a4-3833-42fa-95ae-1a9383a646aa" xlink:to="loc_us-gaap_CustomerListsMember_0280cb4d-784c-4d5e-8ba1-b7b54abaa0e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_dddd908e-2867-4cd7-9ff6-dc531256b3f7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TrademarksAndTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb038a4-3833-42fa-95ae-1a9383a646aa" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_dddd908e-2867-4cd7-9ff6-dc531256b3f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_7c0a0116-7533-4fef-8e42-99252a161710" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb038a4-3833-42fa-95ae-1a9383a646aa" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_7c0a0116-7533-4fef-8e42-99252a161710" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_a1fe7508-561b-49bf-97e0-c912a1519950" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_9eb038a4-3833-42fa-95ae-1a9383a646aa" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_a1fe7508-561b-49bf-97e0-c912a1519950" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_42132e98-e7f4-4e6e-bca6-bcfb362b41d6" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_8cd68c47-e513-422e-88bf-eb0f6d516a13" xlink:to="loc_srt_RangeAxis_42132e98-e7f4-4e6e-bca6-bcfb362b41d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_42132e98-e7f4-4e6e-bca6-bcfb362b41d6_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_42132e98-e7f4-4e6e-bca6-bcfb362b41d6" xlink:to="loc_srt_RangeMember_42132e98-e7f4-4e6e-bca6-bcfb362b41d6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_77e5efe8-75ca-4e23-bd33-2cc1a8757fb7" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_42132e98-e7f4-4e6e-bca6-bcfb362b41d6" xlink:to="loc_srt_RangeMember_77e5efe8-75ca-4e23-bd33-2cc1a8757fb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_6880cdb1-a415-477b-9409-10fc4520af5e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_77e5efe8-75ca-4e23-bd33-2cc1a8757fb7" xlink:to="loc_srt_MinimumMember_6880cdb1-a415-477b-9409-10fc4520af5e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_44718e0f-5dde-4fe7-83f7-679869c19917" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_77e5efe8-75ca-4e23-bd33-2cc1a8757fb7" xlink:to="loc_srt_MaximumMember_44718e0f-5dde-4fe7-83f7-679869c19917" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_e867c6e5-b976-40af-8546-98d5551e941a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_e49456b4-eb9b-45a8-89be-9dfc30db7690" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_e867c6e5-b976-40af-8546-98d5551e941a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_3c121b49-1c29-40f9-aab6-0f39a6b7970d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_e867c6e5-b976-40af-8546-98d5551e941a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_3c121b49-1c29-40f9-aab6-0f39a6b7970d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_3f8054e2-29be-4a96-9b2d-b565401ac88b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_e867c6e5-b976-40af-8546-98d5551e941a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_3f8054e2-29be-4a96-9b2d-b565401ac88b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_248c331b-8c2b-4d30-af21-9e1cc1a5ac13" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNetAbstract_e867c6e5-b976-40af-8546-98d5551e941a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_248c331b-8c2b-4d30-af21-9e1cc1a5ac13" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/EQUITYMETHODINVESTMENTDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#EQUITYMETHODINVESTMENTDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/EQUITYMETHODINVESTMENTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_5ee8136c-6239-4cb8-be52-12a74fc6aa9f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_1b60d7b8-bd1e-433d-8a89-ae83919a399f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_5ee8136c-6239-4cb8-be52-12a74fc6aa9f" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_1b60d7b8-bd1e-433d-8a89-ae83919a399f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_91607faf-0679-436f-b2b3-c8cc2a6a6b5e" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_1b60d7b8-bd1e-433d-8a89-ae83919a399f" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_91607faf-0679-436f-b2b3-c8cc2a6a6b5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_91607faf-0679-436f-b2b3-c8cc2a6a6b5e_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_91607faf-0679-436f-b2b3-c8cc2a6a6b5e" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_91607faf-0679-436f-b2b3-c8cc2a6a6b5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_46319327-f0b8-49a2-876a-2db08482de72" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_91607faf-0679-436f-b2b3-c8cc2a6a6b5e" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_46319327-f0b8-49a2-876a-2db08482de72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_StGabrielCCCompanyLLCMember_ce2f9b8d-3712-45e3-bad5-04ccb8afaae0" xlink:href="bcpc-20241231.xsd#bcpc_StGabrielCCCompanyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_46319327-f0b8-49a2-876a-2db08482de72" xlink:to="loc_bcpc_StGabrielCCCompanyLLCMember_ce2f9b8d-3712-45e3-bad5-04ccb8afaae0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_99501857-75cd-4975-83fb-9c48e9ba6252" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_1b60d7b8-bd1e-433d-8a89-ae83919a399f" xlink:to="loc_srt_CounterpartyNameAxis_99501857-75cd-4975-83fb-9c48e9ba6252" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_99501857-75cd-4975-83fb-9c48e9ba6252_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_99501857-75cd-4975-83fb-9c48e9ba6252" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_99501857-75cd-4975-83fb-9c48e9ba6252_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_deecaa2f-40d2-4dc3-92a6-49c7c37c08d9" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_99501857-75cd-4975-83fb-9c48e9ba6252" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_deecaa2f-40d2-4dc3-92a6-49c7c37c08d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_EastmanChemicalCompanyMember_1ea8ff37-b5df-4989-b9f5-c54079173114" xlink:href="bcpc-20241231.xsd#bcpc_EastmanChemicalCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_deecaa2f-40d2-4dc3-92a6-49c7c37c08d9" xlink:to="loc_bcpc_EastmanChemicalCompanyMember_1ea8ff37-b5df-4989-b9f5-c54079173114" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_b726ad4a-42e2-469d-9278-0bdbe28aea47" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_5ee8136c-6239-4cb8-be52-12a74fc6aa9f" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_b726ad4a-42e2-469d-9278-0bdbe28aea47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_EquityMethodInvestmentNumberOfVotes_70319b07-4b7e-4303-bd4e-96d8f93590e1" xlink:href="bcpc-20241231.xsd#bcpc_EquityMethodInvestmentNumberOfVotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_5ee8136c-6239-4cb8-be52-12a74fc6aa9f" xlink:to="loc_bcpc_EquityMethodInvestmentNumberOfVotes_70319b07-4b7e-4303-bd4e-96d8f93590e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_3c98619c-399c-466e-a1e7-97b4f2372641" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_5ee8136c-6239-4cb8-be52-12a74fc6aa9f" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_3c98619c-399c-466e-a1e7-97b4f2372641" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireEquityMethodInvestments_71705a2f-af7e-460c-95eb-68eb8dc23bea" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsToAcquireEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_5ee8136c-6239-4cb8-be52-12a74fc6aa9f" xlink:to="loc_us-gaap_PaymentsToAcquireEquityMethodInvestments_71705a2f-af7e-460c-95eb-68eb8dc23bea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_d226eff7-9c14-4d11-b66b-75d0bed01f0d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_5ee8136c-6239-4cb8-be52-12a74fc6aa9f" xlink:to="loc_us-gaap_EquityMethodInvestments_d226eff7-9c14-4d11-b66b-75d0bed01f0d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_PercentageOfOperatingExpensesToBeAbsorbed_41a4f133-02e7-4f67-9323-772c26fc4851" xlink:href="bcpc-20241231.xsd#bcpc_PercentageOfOperatingExpensesToBeAbsorbed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_5ee8136c-6239-4cb8-be52-12a74fc6aa9f" xlink:to="loc_bcpc_PercentageOfOperatingExpensesToBeAbsorbed_41a4f133-02e7-4f67-9323-772c26fc4851" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_PercentageOfProductionOfftake_93d2ba79-75ec-4089-a9d3-6821af4b108c" xlink:href="bcpc-20241231.xsd#bcpc_PercentageOfProductionOfftake"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_5ee8136c-6239-4cb8-be52-12a74fc6aa9f" xlink:to="loc_bcpc_PercentageOfProductionOfftake_93d2ba79-75ec-4089-a9d3-6821af4b108c" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/REVOLVINGLOANDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#REVOLVINGLOANDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/REVOLVINGLOANDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_8a2ccee9-af21-425e-9a5e-efc7fb46e38a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_c95096b3-07de-41d7-a13a-ab424363c2af" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8a2ccee9-af21-425e-9a5e-efc7fb46e38a" xlink:to="loc_us-gaap_DebtInstrumentTable_c95096b3-07de-41d7-a13a-ab424363c2af" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_4c78fc9d-975e-4452-bbcc-b30072d25574" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_c95096b3-07de-41d7-a13a-ab424363c2af" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_4c78fc9d-975e-4452-bbcc-b30072d25574" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_4c78fc9d-975e-4452-bbcc-b30072d25574_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4c78fc9d-975e-4452-bbcc-b30072d25574" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_4c78fc9d-975e-4452-bbcc-b30072d25574_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_6bc4560f-5959-4187-9a63-6781cb64c84c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4c78fc9d-975e-4452-bbcc-b30072d25574" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_6bc4560f-5959-4187-9a63-6781cb64c84c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_687183be-3864-4893-b595-0608e57315ca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_6bc4560f-5959-4187-9a63-6781cb64c84c" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_687183be-3864-4893-b595-0608e57315ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_dab699b3-8596-4b93-b7d0-8ec1bed5ca64" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_c95096b3-07de-41d7-a13a-ab424363c2af" xlink:to="loc_us-gaap_DebtInstrumentAxis_dab699b3-8596-4b93-b7d0-8ec1bed5ca64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_dab699b3-8596-4b93-b7d0-8ec1bed5ca64_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_dab699b3-8596-4b93-b7d0-8ec1bed5ca64" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_dab699b3-8596-4b93-b7d0-8ec1bed5ca64_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_36b21c3a-0119-416f-b917-52b4158b2622" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_dab699b3-8596-4b93-b7d0-8ec1bed5ca64" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_36b21c3a-0119-416f-b917-52b4158b2622" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_A2018CreditAgreementMember_fdc13ca3-df4c-42b0-a2af-fd3374c81cbf" xlink:href="bcpc-20241231.xsd#bcpc_A2018CreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_36b21c3a-0119-416f-b917-52b4158b2622" xlink:to="loc_bcpc_A2018CreditAgreementMember_fdc13ca3-df4c-42b0-a2af-fd3374c81cbf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_RevolvingCreditAgreementMember_23a24e71-7d25-48d4-a006-d42aae291c06" xlink:href="bcpc-20241231.xsd#bcpc_RevolvingCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_36b21c3a-0119-416f-b917-52b4158b2622" xlink:to="loc_bcpc_RevolvingCreditAgreementMember_23a24e71-7d25-48d4-a006-d42aae291c06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_bb35db2e-d9ba-433f-b978-bd034fa5c970" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_c95096b3-07de-41d7-a13a-ab424363c2af" xlink:to="loc_srt_RangeAxis_bb35db2e-d9ba-433f-b978-bd034fa5c970" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_bb35db2e-d9ba-433f-b978-bd034fa5c970_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_bb35db2e-d9ba-433f-b978-bd034fa5c970" xlink:to="loc_srt_RangeMember_bb35db2e-d9ba-433f-b978-bd034fa5c970_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c9bd8cdc-35bc-4719-b5aa-28b7da61e67f" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_bb35db2e-d9ba-433f-b978-bd034fa5c970" xlink:to="loc_srt_RangeMember_c9bd8cdc-35bc-4719-b5aa-28b7da61e67f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_4849c814-a3e2-4300-b78c-4267c4a0f209" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c9bd8cdc-35bc-4719-b5aa-28b7da61e67f" xlink:to="loc_srt_MinimumMember_4849c814-a3e2-4300-b78c-4267c4a0f209" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_587c35d6-c696-411c-9b16-079e37e2a11a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c9bd8cdc-35bc-4719-b5aa-28b7da61e67f" xlink:to="loc_srt_MaximumMember_587c35d6-c696-411c-9b16-079e37e2a11a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1a82460c-20f1-4213-9489-548bcfd66a31" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8a2ccee9-af21-425e-9a5e-efc7fb46e38a" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_1a82460c-20f1-4213-9489-548bcfd66a31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_5d1efc93-1c26-4551-a893-e760c13db9b1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8a2ccee9-af21-425e-9a5e-efc7fb46e38a" xlink:to="loc_us-gaap_LineOfCredit_5d1efc93-1c26-4551-a893-e760c13db9b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_3222c1b6-5a09-4e42-8698-bbac34ede9c3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8a2ccee9-af21-425e-9a5e-efc7fb46e38a" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_3222c1b6-5a09-4e42-8698-bbac34ede9c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_314544dc-2bc4-4a6f-8bff-c12ac7709184" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8a2ccee9-af21-425e-9a5e-efc7fb46e38a" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_314544dc-2bc4-4a6f-8bff-c12ac7709184" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_17405166-9892-4624-8c7e-cbac6777a75e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8a2ccee9-af21-425e-9a5e-efc7fb46e38a" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_17405166-9892-4624-8c7e-cbac6777a75e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_6669ba34-58da-43fb-95e3-41e8af2e7d0b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8a2ccee9-af21-425e-9a5e-efc7fb46e38a" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_6669ba34-58da-43fb-95e3-41e8af2e7d0b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_2f88794c-87ac-4602-8c6c-f47849e41bef" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8a2ccee9-af21-425e-9a5e-efc7fb46e38a" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_2f88794c-87ac-4602-8c6c-f47849e41bef" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/INCOMETAXESNarrativeDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#INCOMETAXESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/INCOMETAXESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_ce86f79d-6cc2-4cdf-8ece-1d6d332e25be" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLossCarryforwardsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_71cf2775-efd0-4529-8b04-b4471528eeaf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLossCarryforwardsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_ce86f79d-6cc2-4cdf-8ece-1d6d332e25be" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_71cf2775-efd0-4529-8b04-b4471528eeaf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_88fcc4ca-987b-4d50-abba-53ef42791ffd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_71cf2775-efd0-4529-8b04-b4471528eeaf" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_88fcc4ca-987b-4d50-abba-53ef42791ffd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_88fcc4ca-987b-4d50-abba-53ef42791ffd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_88fcc4ca-987b-4d50-abba-53ef42791ffd" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_88fcc4ca-987b-4d50-abba-53ef42791ffd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_5d5d5145-a506-44c5-b444-9f62f5eb61c9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_88fcc4ca-987b-4d50-abba-53ef42791ffd" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_5d5d5145-a506-44c5-b444-9f62f5eb61c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_ccf8ab0a-8f19-43bc-bce3-e067db289415" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StateAndLocalJurisdictionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_5d5d5145-a506-44c5-b444-9f62f5eb61c9" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_ccf8ab0a-8f19-43bc-bce3-e067db289415" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_893650db-ae91-4116-aa1b-8c4f9e30185c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_ce86f79d-6cc2-4cdf-8ece-1d6d332e25be" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_893650db-ae91-4116-aa1b-8c4f9e30185c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignEarningsRepatriated_ed16d634-b3fc-4ab8-beef-79cbcadcfb01" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignEarningsRepatriated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_ce86f79d-6cc2-4cdf-8ece-1d6d332e25be" xlink:to="loc_us-gaap_ForeignEarningsRepatriated_ed16d634-b3fc-4ab8-beef-79cbcadcfb01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_56d60797-2f6e-4653-8419-3cb0bc0cafc6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_ce86f79d-6cc2-4cdf-8ece-1d6d332e25be" xlink:to="loc_us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_56d60797-2f6e-4653-8419-3cb0bc0cafc6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_a556c62d-e370-4997-bafe-8545a8a4e379" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_ce86f79d-6cc2-4cdf-8ece-1d6d332e25be" xlink:to="loc_us-gaap_OperatingLossCarryforwards_a556c62d-e370-4997-bafe-8545a8a4e379" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_25b70dfe-5a54-4525-83a1-799f5b4fa882" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_ce86f79d-6cc2-4cdf-8ece-1d6d332e25be" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_25b70dfe-5a54-4525-83a1-799f5b4fa882" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_337f2c28-7280-4170-8e0f-03826852cb5f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_ce86f79d-6cc2-4cdf-8ece-1d6d332e25be" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_337f2c28-7280-4170-8e0f-03826852cb5f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_c58f3f36-1834-41e6-b078-8a60c46c0c5e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_ce86f79d-6cc2-4cdf-8ece-1d6d332e25be" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_c58f3f36-1834-41e6-b078-8a60c46c0c5e" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/SEGMENTINFORMATIONBusinessSegmentNetSalesDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#SEGMENTINFORMATIONBusinessSegmentNetSalesDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/SEGMENTINFORMATIONBusinessSegmentNetSalesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_f18bb5b4-7011-4586-9e85-ef97603af8db" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_f18bb5b4-7011-4586-9e85-ef97603af8db" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_d9362064-8333-41be-a156-15c575953a7f" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_f18bb5b4-7011-4586-9e85-ef97603af8db" xlink:to="loc_srt_ConsolidationItemsAxis_d9362064-8333-41be-a156-15c575953a7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_d9362064-8333-41be-a156-15c575953a7f_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_d9362064-8333-41be-a156-15c575953a7f" xlink:to="loc_srt_ConsolidationItemsDomain_d9362064-8333-41be-a156-15c575953a7f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_8cf859db-f3a9-45d3-b052-2fded047d682" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_d9362064-8333-41be-a156-15c575953a7f" xlink:to="loc_srt_ConsolidationItemsDomain_8cf859db-f3a9-45d3-b052-2fded047d682" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_fd8f0a47-51ae-48a0-8c6a-ee65aa70480f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_8cf859db-f3a9-45d3-b052-2fded047d682" xlink:to="loc_us-gaap_OperatingSegmentsMember_fd8f0a47-51ae-48a0-8c6a-ee65aa70480f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_6165e289-a1ba-4c32-898f-359db266beb5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_8cf859db-f3a9-45d3-b052-2fded047d682" xlink:to="loc_us-gaap_CorporateNonSegmentMember_6165e289-a1ba-4c32-898f-359db266beb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_9ddb0ede-6fb2-4a69-ae60-af9625793a10" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_f18bb5b4-7011-4586-9e85-ef97603af8db" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_9ddb0ede-6fb2-4a69-ae60-af9625793a10" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_9ddb0ede-6fb2-4a69-ae60-af9625793a10_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9ddb0ede-6fb2-4a69-ae60-af9625793a10" xlink:to="loc_us-gaap_SegmentDomain_9ddb0ede-6fb2-4a69-ae60-af9625793a10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_fcd42f89-4c61-4d52-a406-d8279176a409" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9ddb0ede-6fb2-4a69-ae60-af9625793a10" xlink:to="loc_us-gaap_SegmentDomain_fcd42f89-4c61-4d52-a406-d8279176a409" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_HumanNutritionAndHealthMember_1345dda2-51bf-456a-808d-33e1e9274d90" xlink:href="bcpc-20241231.xsd#bcpc_HumanNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_fcd42f89-4c61-4d52-a406-d8279176a409" xlink:to="loc_bcpc_HumanNutritionAndHealthMember_1345dda2-51bf-456a-808d-33e1e9274d90" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_AnimalNutritionAndHealthMember_89e64a17-99d6-4231-b8bc-d2c848f4a6ea" xlink:href="bcpc-20241231.xsd#bcpc_AnimalNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_fcd42f89-4c61-4d52-a406-d8279176a409" xlink:to="loc_bcpc_AnimalNutritionAndHealthMember_89e64a17-99d6-4231-b8bc-d2c848f4a6ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_SpecialtyProductsMember_8dac07ab-62cd-4680-a6bb-08f9ad926472" xlink:href="bcpc-20241231.xsd#bcpc_SpecialtyProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_fcd42f89-4c61-4d52-a406-d8279176a409" xlink:to="loc_bcpc_SpecialtyProductsMember_8dac07ab-62cd-4680-a6bb-08f9ad926472" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_b8ada1fc-c8dc-4ea3-8aa2-fee32407dacf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_b8ada1fc-c8dc-4ea3-8aa2-fee32407dacf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_648bb576-6c2c-43c6-81c7-bdbda37a9447" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_CostOfRevenue_648bb576-6c2c-43c6-81c7-bdbda37a9447" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_35116e9e-1715-42db-87ab-e81c93e7c00f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_GrossProfit_35116e9e-1715-42db-87ab-e81c93e7c00f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_fd66a525-feda-4bd6-889a-8347be717863" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_OperatingExpenses_fd66a525-feda-4bd6-889a-8347be717863" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_cdbbc8d6-18e7-48fb-aee5-c46e61dc1f96" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_OperatingIncomeLoss_cdbbc8d6-18e7-48fb-aee5-c46e61dc1f96" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_0738af6b-a421-4c1b-9a22-ce5697855ddf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_0738af6b-a421-4c1b-9a22-ce5697855ddf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_71b29887-68c9-4b01-ac71-7d64451cda01" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_71b29887-68c9-4b01-ac71-7d64451cda01" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_c567fd84-7569-43cb-b73f-9b2d300f2fd7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_c567fd84-7569-43cb-b73f-9b2d300f2fd7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1bd5dd7c-604e-45ed-9730-ce4f98f5b3e6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1bd5dd7c-604e-45ed-9730-ce4f98f5b3e6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_d48fe9ca-cdc5-4dd4-9f17-93ed1b58ed85" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_d48fe9ca-cdc5-4dd4-9f17-93ed1b58ed85" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_a7bb6552-1937-4ce1-9cc9-9cc780252ea9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_eabf1fb8-8401-40c0-9197-769d224a3c94" xlink:to="loc_us-gaap_NetIncomeLoss_a7bb6552-1937-4ce1-9cc9-9cc780252ea9" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/SEGMENTINFORMATIONBusinessSegmentAssetsDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#SEGMENTINFORMATIONBusinessSegmentAssetsDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/SEGMENTINFORMATIONBusinessSegmentAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_7ab1689d-1c8a-4f6e-83f4-c7c9bdeb619b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ea3df9f6-ebfe-472b-a822-c2d3a9c55d00" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7ab1689d-1c8a-4f6e-83f4-c7c9bdeb619b" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ea3df9f6-ebfe-472b-a822-c2d3a9c55d00" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_b8ec9362-23e8-49d9-a911-ad316ea72a56" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ea3df9f6-ebfe-472b-a822-c2d3a9c55d00" xlink:to="loc_srt_ConsolidationItemsAxis_b8ec9362-23e8-49d9-a911-ad316ea72a56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_b8ec9362-23e8-49d9-a911-ad316ea72a56_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_b8ec9362-23e8-49d9-a911-ad316ea72a56" xlink:to="loc_srt_ConsolidationItemsDomain_b8ec9362-23e8-49d9-a911-ad316ea72a56_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_bbb2812f-8f52-4242-a924-dede26bb0544" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_b8ec9362-23e8-49d9-a911-ad316ea72a56" xlink:to="loc_srt_ConsolidationItemsDomain_bbb2812f-8f52-4242-a924-dede26bb0544" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_53f7f822-0df1-435c-948a-cc4f361bf264" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_bbb2812f-8f52-4242-a924-dede26bb0544" xlink:to="loc_us-gaap_OperatingSegmentsMember_53f7f822-0df1-435c-948a-cc4f361bf264" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_57252dda-413d-4e3e-9ae8-5e90b1792558" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_bbb2812f-8f52-4242-a924-dede26bb0544" xlink:to="loc_us-gaap_CorporateNonSegmentMember_57252dda-413d-4e3e-9ae8-5e90b1792558" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_730e25d7-cca6-48b8-adee-8a403ac56de0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ea3df9f6-ebfe-472b-a822-c2d3a9c55d00" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_730e25d7-cca6-48b8-adee-8a403ac56de0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_730e25d7-cca6-48b8-adee-8a403ac56de0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_730e25d7-cca6-48b8-adee-8a403ac56de0" xlink:to="loc_us-gaap_SegmentDomain_730e25d7-cca6-48b8-adee-8a403ac56de0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_921e72c4-a391-497e-9cff-455bfdd1ae53" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_730e25d7-cca6-48b8-adee-8a403ac56de0" xlink:to="loc_us-gaap_SegmentDomain_921e72c4-a391-497e-9cff-455bfdd1ae53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_HumanNutritionAndHealthMember_3d250b8c-d106-4bcf-a3fb-1498dd8d0656" xlink:href="bcpc-20241231.xsd#bcpc_HumanNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_921e72c4-a391-497e-9cff-455bfdd1ae53" xlink:to="loc_bcpc_HumanNutritionAndHealthMember_3d250b8c-d106-4bcf-a3fb-1498dd8d0656" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_AnimalNutritionAndHealthMember_fae0e3c6-ea04-4e5b-bd41-0a5945b2cbb1" xlink:href="bcpc-20241231.xsd#bcpc_AnimalNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_921e72c4-a391-497e-9cff-455bfdd1ae53" xlink:to="loc_bcpc_AnimalNutritionAndHealthMember_fae0e3c6-ea04-4e5b-bd41-0a5945b2cbb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_SpecialtyProductsMember_af19b5ec-ce42-4d8e-927b-ea70f442d53f" xlink:href="bcpc-20241231.xsd#bcpc_SpecialtyProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_921e72c4-a391-497e-9cff-455bfdd1ae53" xlink:to="loc_bcpc_SpecialtyProductsMember_af19b5ec-ce42-4d8e-927b-ea70f442d53f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_9a3aa6ae-96eb-4610-a3f0-4acb96df7ca1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7ab1689d-1c8a-4f6e-83f4-c7c9bdeb619b" xlink:to="loc_us-gaap_Assets_9a3aa6ae-96eb-4610-a3f0-4acb96df7ca1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/SEGMENTINFORMATIONDepreciationAmortizationDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#SEGMENTINFORMATIONDepreciationAmortizationDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/SEGMENTINFORMATIONDepreciationAmortizationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_a8735e48-4148-4f5c-8d3b-5938c359c733" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_35921abf-1a78-4e15-97f0-f7b8b2bc61ce" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a8735e48-4148-4f5c-8d3b-5938c359c733" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_35921abf-1a78-4e15-97f0-f7b8b2bc61ce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_59fff92d-b541-4191-8822-03395ab866b6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_35921abf-1a78-4e15-97f0-f7b8b2bc61ce" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_59fff92d-b541-4191-8822-03395ab866b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_59fff92d-b541-4191-8822-03395ab866b6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_59fff92d-b541-4191-8822-03395ab866b6" xlink:to="loc_us-gaap_SegmentDomain_59fff92d-b541-4191-8822-03395ab866b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_2c7562cd-37ce-4c48-a111-540879605f45" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_59fff92d-b541-4191-8822-03395ab866b6" xlink:to="loc_us-gaap_SegmentDomain_2c7562cd-37ce-4c48-a111-540879605f45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_HumanNutritionAndHealthMember_4df19ece-9a54-4d47-ac2b-fd251e0c000d" xlink:href="bcpc-20241231.xsd#bcpc_HumanNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2c7562cd-37ce-4c48-a111-540879605f45" xlink:to="loc_bcpc_HumanNutritionAndHealthMember_4df19ece-9a54-4d47-ac2b-fd251e0c000d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_AnimalNutritionAndHealthMember_7ff269b6-c5ee-47bb-a181-e9e14682b354" xlink:href="bcpc-20241231.xsd#bcpc_AnimalNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2c7562cd-37ce-4c48-a111-540879605f45" xlink:to="loc_bcpc_AnimalNutritionAndHealthMember_7ff269b6-c5ee-47bb-a181-e9e14682b354" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_SpecialtyProductsMember_2c52623d-94ba-49f5-a079-c8f025a761c5" xlink:href="bcpc-20241231.xsd#bcpc_SpecialtyProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2c7562cd-37ce-4c48-a111-540879605f45" xlink:to="loc_bcpc_SpecialtyProductsMember_2c52623d-94ba-49f5-a079-c8f025a761c5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_3a67e653-c678-4bfc-b88a-47a74abf458d" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_35921abf-1a78-4e15-97f0-f7b8b2bc61ce" xlink:to="loc_srt_ConsolidationItemsAxis_3a67e653-c678-4bfc-b88a-47a74abf458d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_3a67e653-c678-4bfc-b88a-47a74abf458d_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_3a67e653-c678-4bfc-b88a-47a74abf458d" xlink:to="loc_srt_ConsolidationItemsDomain_3a67e653-c678-4bfc-b88a-47a74abf458d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_e0111c3e-0548-41ed-831e-96c4da00739c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_3a67e653-c678-4bfc-b88a-47a74abf458d" xlink:to="loc_srt_ConsolidationItemsDomain_e0111c3e-0548-41ed-831e-96c4da00739c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_7ea3461f-c862-4773-8e08-ee8eac2ed54c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_e0111c3e-0548-41ed-831e-96c4da00739c" xlink:to="loc_us-gaap_OperatingSegmentsMember_7ea3461f-c862-4773-8e08-ee8eac2ed54c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_9d1c71c4-0962-4e1f-a555-d860165d567f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_e0111c3e-0548-41ed-831e-96c4da00739c" xlink:to="loc_us-gaap_CorporateNonSegmentMember_9d1c71c4-0962-4e1f-a555-d860165d567f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_a4ce203e-3046-400d-ab05-41983d8224c0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a8735e48-4148-4f5c-8d3b-5938c359c733" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_a4ce203e-3046-400d-ab05-41983d8224c0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/SEGMENTINFORMATIONCapitalExpendituresDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#SEGMENTINFORMATIONCapitalExpendituresDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/SEGMENTINFORMATIONCapitalExpendituresDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_c057289b-067b-4b3a-b462-95e5095139a7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_dc1451ea-8141-4d9d-8963-b88103da4d05" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_c057289b-067b-4b3a-b462-95e5095139a7" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_dc1451ea-8141-4d9d-8963-b88103da4d05" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_913d8d7b-518b-4854-bbdf-4e62d0ddafaf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_dc1451ea-8141-4d9d-8963-b88103da4d05" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_913d8d7b-518b-4854-bbdf-4e62d0ddafaf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_913d8d7b-518b-4854-bbdf-4e62d0ddafaf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_913d8d7b-518b-4854-bbdf-4e62d0ddafaf" xlink:to="loc_us-gaap_SegmentDomain_913d8d7b-518b-4854-bbdf-4e62d0ddafaf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e85f3669-6ebb-4cdb-8c43-203743faebe6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_913d8d7b-518b-4854-bbdf-4e62d0ddafaf" xlink:to="loc_us-gaap_SegmentDomain_e85f3669-6ebb-4cdb-8c43-203743faebe6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_HumanNutritionAndHealthMember_0aa024a2-caa4-4941-95f9-bd5def39dbc7" xlink:href="bcpc-20241231.xsd#bcpc_HumanNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e85f3669-6ebb-4cdb-8c43-203743faebe6" xlink:to="loc_bcpc_HumanNutritionAndHealthMember_0aa024a2-caa4-4941-95f9-bd5def39dbc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_AnimalNutritionAndHealthMember_ebdb3f13-9570-483a-8b00-53741f10121e" xlink:href="bcpc-20241231.xsd#bcpc_AnimalNutritionAndHealthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e85f3669-6ebb-4cdb-8c43-203743faebe6" xlink:to="loc_bcpc_AnimalNutritionAndHealthMember_ebdb3f13-9570-483a-8b00-53741f10121e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_SpecialtyProductsMember_3475ee03-00f6-4ba5-8b3a-aaabb6e91a87" xlink:href="bcpc-20241231.xsd#bcpc_SpecialtyProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_e85f3669-6ebb-4cdb-8c43-203743faebe6" xlink:to="loc_bcpc_SpecialtyProductsMember_3475ee03-00f6-4ba5-8b3a-aaabb6e91a87" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_46ef8472-ac37-4efe-a740-328dd2ec3423" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_dc1451ea-8141-4d9d-8963-b88103da4d05" xlink:to="loc_srt_ConsolidationItemsAxis_46ef8472-ac37-4efe-a740-328dd2ec3423" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_46ef8472-ac37-4efe-a740-328dd2ec3423_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_46ef8472-ac37-4efe-a740-328dd2ec3423" xlink:to="loc_srt_ConsolidationItemsDomain_46ef8472-ac37-4efe-a740-328dd2ec3423_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_3533c5e7-4f30-4d5c-a90c-4063a1b11e23" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_46ef8472-ac37-4efe-a740-328dd2ec3423" xlink:to="loc_srt_ConsolidationItemsDomain_3533c5e7-4f30-4d5c-a90c-4063a1b11e23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_8e76e19e-97a4-4a5c-bec4-ee30281b40f6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_3533c5e7-4f30-4d5c-a90c-4063a1b11e23" xlink:to="loc_us-gaap_OperatingSegmentsMember_8e76e19e-97a4-4a5c-bec4-ee30281b40f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_b67fea08-a7bd-495a-bb42-874621ec18dc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_3533c5e7-4f30-4d5c-a90c-4063a1b11e23" xlink:to="loc_us-gaap_CorporateNonSegmentMember_b67fea08-a7bd-495a-bb42-874621ec18dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_9103ee14-8ce8-437a-b6a7-e9dccb99c60f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentExpenditureAdditionToLongLivedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_c057289b-067b-4b3a-b462-95e5095139a7" xlink:to="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_9103ee14-8ce8-437a-b6a7-e9dccb99c60f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/REVENUEDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#REVENUEDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/REVENUEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_45225e94-a06d-4dc9-8a76-65cc472d9300" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_aacea909-839c-467a-a189-1f9a9122ab11" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_45225e94-a06d-4dc9-8a76-65cc472d9300" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_aacea909-839c-467a-a189-1f9a9122ab11" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_cb63507e-085b-4959-a649-17cdef4b9bba" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_aacea909-839c-467a-a189-1f9a9122ab11" xlink:to="loc_srt_ProductOrServiceAxis_cb63507e-085b-4959-a649-17cdef4b9bba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_cb63507e-085b-4959-a649-17cdef4b9bba_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_cb63507e-085b-4959-a649-17cdef4b9bba" xlink:to="loc_srt_ProductsAndServicesDomain_cb63507e-085b-4959-a649-17cdef4b9bba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_85eac41b-2483-4d53-b97f-1b04b336b76c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_cb63507e-085b-4959-a649-17cdef4b9bba" xlink:to="loc_srt_ProductsAndServicesDomain_85eac41b-2483-4d53-b97f-1b04b336b76c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_ProductSalesMember_8e6fe148-b167-4a43-9039-4018adcff1ea" xlink:href="bcpc-20241231.xsd#bcpc_ProductSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_85eac41b-2483-4d53-b97f-1b04b336b76c" xlink:to="loc_bcpc_ProductSalesMember_8e6fe148-b167-4a43-9039-4018adcff1ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RoyaltyMember_f85deaf7-89a3-420a-8c7b-0a7bbcc437e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RoyaltyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_85eac41b-2483-4d53-b97f-1b04b336b76c" xlink:to="loc_us-gaap_RoyaltyMember_f85deaf7-89a3-420a-8c7b-0a7bbcc437e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_3acc7eaf-5273-4406-ac51-1ecccb4fbefe" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_aacea909-839c-467a-a189-1f9a9122ab11" xlink:to="loc_srt_StatementGeographicalAxis_3acc7eaf-5273-4406-ac51-1ecccb4fbefe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_3acc7eaf-5273-4406-ac51-1ecccb4fbefe_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_3acc7eaf-5273-4406-ac51-1ecccb4fbefe" xlink:to="loc_srt_SegmentGeographicalDomain_3acc7eaf-5273-4406-ac51-1ecccb4fbefe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_0af49845-0f80-4ae0-a35b-3e2022e885d5" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_3acc7eaf-5273-4406-ac51-1ecccb4fbefe" xlink:to="loc_srt_SegmentGeographicalDomain_0af49845-0f80-4ae0-a35b-3e2022e885d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_19a2ba70-8193-45a2-a152-9b5b119aed68" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_0af49845-0f80-4ae0-a35b-3e2022e885d5" xlink:to="loc_country_US_19a2ba70-8193-45a2-a152-9b5b119aed68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_11396e91-75d0-44e1-8722-45a84e0501d9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_0af49845-0f80-4ae0-a35b-3e2022e885d5" xlink:to="loc_us-gaap_NonUsMember_11396e91-75d0-44e1-8722-45a84e0501d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_56187534-8cf8-4f4a-86a4-3e013883aec9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_45225e94-a06d-4dc9-8a76-65cc472d9300" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_56187534-8cf8-4f4a-86a4-3e013883aec9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMEChangesinAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#ACCUMULATEDOTHERCOMPREHENSIVEINCOMEChangesinAccumulatedOtherComprehensiveIncomeLossDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMEChangesinAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_948cd051-941f-4ffa-ab4f-3e11234a4bbd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_b0d3b8d8-05fc-4398-91d2-27ee00e73979" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_948cd051-941f-4ffa-ab4f-3e11234a4bbd" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_b0d3b8d8-05fc-4398-91d2-27ee00e73979" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_0bca980d-e07a-4482-b1ee-7f3cf6793143" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_b0d3b8d8-05fc-4398-91d2-27ee00e73979" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_0bca980d-e07a-4482-b1ee-7f3cf6793143" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_0bca980d-e07a-4482-b1ee-7f3cf6793143_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_0bca980d-e07a-4482-b1ee-7f3cf6793143" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_0bca980d-e07a-4482-b1ee-7f3cf6793143_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_42c34ab1-2181-4ac2-bd84-0cb28d6e65ca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_0bca980d-e07a-4482-b1ee-7f3cf6793143" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_42c34ab1-2181-4ac2-bd84-0cb28d6e65ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember_6b899f1c-7358-4e35-b06a-069f5c309d19" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrencySwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_42c34ab1-2181-4ac2-bd84-0cb28d6e65ca" xlink:to="loc_us-gaap_CurrencySwapMember_6b899f1c-7358-4e35-b06a-069f5c309d19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_da436100-961a-42b9-af7f-ab2e550ab008" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_948cd051-941f-4ffa-ab4f-3e11234a4bbd" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_da436100-961a-42b9-af7f-ab2e550ab008" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_ee1f4a84-99ce-4c7f-80d1-8cfe877c7810" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_da436100-961a-42b9-af7f-ab2e550ab008" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_ee1f4a84-99ce-4c7f-80d1-8cfe877c7810" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_b2ec403c-c082-41d8-830e-952a392b4d6b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_da436100-961a-42b9-af7f-ab2e550ab008" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_b2ec403c-c082-41d8-830e-952a392b4d6b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_46e69b21-72f0-495b-a73d-5f083237c545" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_da436100-961a-42b9-af7f-ab2e550ab008" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_46e69b21-72f0-495b-a73d-5f083237c545" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_c72e0307-7f44-4fcc-a14c-089b42ec6759" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_da436100-961a-42b9-af7f-ab2e550ab008" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_c72e0307-7f44-4fcc-a14c-089b42ec6759" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_7c2459da-57f3-4714-bcd0-742e15be3214" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_da436100-961a-42b9-af7f-ab2e550ab008" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_7c2459da-57f3-4714-bcd0-742e15be3214" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_b3ff3a97-b56f-4bf0-9844-e969efaf0d2c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_7c2459da-57f3-4714-bcd0-742e15be3214" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_b3ff3a97-b56f-4bf0-9844-e969efaf0d2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_d9fae8d0-af4f-4027-9ed6-26868601d73b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_7c2459da-57f3-4714-bcd0-742e15be3214" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_d9fae8d0-af4f-4027-9ed6-26868601d73b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_547fc708-e071-4312-b2bf-11199850b410" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_7c2459da-57f3-4714-bcd0-742e15be3214" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_547fc708-e071-4312-b2bf-11199850b410" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_fd740f15-a6d3-46cf-bf07-b7f6ea78696e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_7c2459da-57f3-4714-bcd0-742e15be3214" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_fd740f15-a6d3-46cf-bf07-b7f6ea78696e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_58559ad7-6fba-4d43-8fdd-5765d1c6e311" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_7c2459da-57f3-4714-bcd0-742e15be3214" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_58559ad7-6fba-4d43-8fdd-5765d1c6e311" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_da565069-4196-4a2e-b8b8-0641e0be6234" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecreaseAbstract_7c2459da-57f3-4714-bcd0-742e15be3214" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_da565069-4196-4a2e-b8b8-0641e0be6234" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_20dfa5d9-8c4f-4aa9-a163-9a4a428d87af" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_da436100-961a-42b9-af7f-ab2e550ab008" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_20dfa5d9-8c4f-4aa9-a163-9a4a428d87af" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent_2f76dd35-4d26-4474-aafa-8f8cd66b92c4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_948cd051-941f-4ffa-ab4f-3e11234a4bbd" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent_2f76dd35-4d26-4474-aafa-8f8cd66b92c4" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMEComponentsofAccumulatedOtherComprehensiveLossIncomeDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#ACCUMULATEDOTHERCOMPREHENSIVEINCOMEComponentsofAccumulatedOtherComprehensiveLossIncomeDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/ACCUMULATEDOTHERCOMPREHENSIVEINCOMEComponentsofAccumulatedOtherComprehensiveLossIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_b2c6e284-cf8f-44a9-afd8-8c6f8d0b4cda" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_63ddd18b-41cc-4d62-a7bb-2282fc4901a4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_b2c6e284-cf8f-44a9-afd8-8c6f8d0b4cda" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_63ddd18b-41cc-4d62-a7bb-2282fc4901a4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_94577631-9caf-4ad5-8e19-47c91263e710" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_63ddd18b-41cc-4d62-a7bb-2282fc4901a4" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_94577631-9caf-4ad5-8e19-47c91263e710" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_94577631-9caf-4ad5-8e19-47c91263e710_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_94577631-9caf-4ad5-8e19-47c91263e710" xlink:to="loc_us-gaap_EquityComponentDomain_94577631-9caf-4ad5-8e19-47c91263e710_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_6f54757d-5b73-465a-ab28-0828d5c3c92c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_94577631-9caf-4ad5-8e19-47c91263e710" xlink:to="loc_us-gaap_EquityComponentDomain_6f54757d-5b73-465a-ab28-0828d5c3c92c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_bfdd86d1-2bfc-441c-b9df-8125c0caf248" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_6f54757d-5b73-465a-ab28-0828d5c3c92c" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_bfdd86d1-2bfc-441c-b9df-8125c0caf248" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_81a56159-3b2d-4c26-a14e-ede7fad41bea" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_bfdd86d1-2bfc-441c-b9df-8125c0caf248" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_81a56159-3b2d-4c26-a14e-ede7fad41bea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_c734b962-15b3-4d16-b941-e74e7c811739" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_bfdd86d1-2bfc-441c-b9df-8125c0caf248" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_c734b962-15b3-4d16-b941-e74e7c811739" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_3c2db2cb-edcb-4e9e-ba98-4ac86878981e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_bfdd86d1-2bfc-441c-b9df-8125c0caf248" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_3c2db2cb-edcb-4e9e-ba98-4ac86878981e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_70982d25-643f-4a35-9c59-9da7d1b1abb2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_b2c6e284-cf8f-44a9-afd8-8c6f8d0b4cda" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_70982d25-643f-4a35-9c59-9da7d1b1abb2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_0c4c9ead-56fa-48a4-b97b-6bc5f2523854" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_70982d25-643f-4a35-9c59-9da7d1b1abb2" xlink:to="loc_us-gaap_StockholdersEquity_0c4c9ead-56fa-48a4-b97b-6bc5f2523854" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_43732503-9fc2-4df4-a7ac-f562757f7fde" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_70982d25-643f-4a35-9c59-9da7d1b1abb2" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_43732503-9fc2-4df4-a7ac-f562757f7fde" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_0edff014-8c07-4d8b-8ce8-41479a32166c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/EMPLOYEEBENEFITPLANSNarrativeDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#EMPLOYEEBENEFITPLANSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/EMPLOYEEBENEFITPLANSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_e9282034-e841-456d-97ff-d9f23400a505" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_e9282034-e841-456d-97ff-d9f23400a505" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_875a4853-d150-405f-99cd-af4b6d4ebe29" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_e9282034-e841-456d-97ff-d9f23400a505" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_875a4853-d150-405f-99cd-af4b6d4ebe29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_875a4853-d150-405f-99cd-af4b6d4ebe29_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_875a4853-d150-405f-99cd-af4b6d4ebe29" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_875a4853-d150-405f-99cd-af4b6d4ebe29_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9e1b43c2-35f8-461e-a490-f18a5252caeb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_875a4853-d150-405f-99cd-af4b6d4ebe29" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9e1b43c2-35f8-461e-a490-f18a5252caeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_KechuBidCoASAndItsSubsidiaryCompaniesKappaMember_a09956e9-bb1d-4d89-adb1-734f84a6fe0b" xlink:href="bcpc-20241231.xsd#bcpc_KechuBidCoASAndItsSubsidiaryCompaniesKappaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9e1b43c2-35f8-461e-a490-f18a5252caeb" xlink:to="loc_bcpc_KechuBidCoASAndItsSubsidiaryCompaniesKappaMember_a09956e9-bb1d-4d89-adb1-734f84a6fe0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_CardinalAssociatesIncBergstromMember_9a600119-aa6d-431a-af9c-4199d3e0e4a7" xlink:href="bcpc-20241231.xsd#bcpc_CardinalAssociatesIncBergstromMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_9e1b43c2-35f8-461e-a490-f18a5252caeb" xlink:to="loc_bcpc_CardinalAssociatesIncBergstromMember_9a600119-aa6d-431a-af9c-4199d3e0e4a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_NumberOfSavingsPlans_905645fd-029c-4daf-945b-e204d161f5ba" xlink:href="bcpc-20241231.xsd#bcpc_NumberOfSavingsPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_bcpc_NumberOfSavingsPlans_905645fd-029c-4daf-945b-e204d161f5ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_NumberOfDefinedContributionPlans_86ddb4f9-d5ae-4dd7-96cd-be88df7d67b8" xlink:href="bcpc-20241231.xsd#bcpc_NumberOfDefinedContributionPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_bcpc_NumberOfDefinedContributionPlans_86ddb4f9-d5ae-4dd7-96cd-be88df7d67b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_1fbb5fbf-4d40-4ea4-9d8c-16daae1ab1e6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_1fbb5fbf-4d40-4ea4-9d8c-16daae1ab1e6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_DefinedBenefitPlanNumberOfBenefitPlans_e38189a9-1a6b-49f6-b0a4-e7c02ff1b2f9" xlink:href="bcpc-20241231.xsd#bcpc_DefinedBenefitPlanNumberOfBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_bcpc_DefinedBenefitPlanNumberOfBenefitPlans_e38189a9-1a6b-49f6-b0a4-e7c02ff1b2f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_MultiemployerPlanPensionNumberOfPlans_5d1c376f-df4d-430e-8326-72a773d967a4" xlink:href="bcpc-20241231.xsd#bcpc_MultiemployerPlanPensionNumberOfPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_bcpc_MultiemployerPlanPensionNumberOfPlans_5d1c376f-df4d-430e-8326-72a773d967a4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MultiemployerPlanContributionRateIncreaseDecrease_16bb3f06-ae68-4037-b762-1ec6d3965fc3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MultiemployerPlanContributionRateIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_us-gaap_MultiemployerPlanContributionRateIncreaseDecrease_16bb3f06-ae68-4037-b762-1ec6d3965fc3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_31315b71-874b-4786-9726-2c00c25ad77b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_31315b71-874b-4786-9726-2c00c25ad77b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_0c6ca68e-3664-4c62-a9e5-82f3caa5f186" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_0c6ca68e-3664-4c62-a9e5-82f3caa5f186" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrent_19f1653f-2585-4a9c-9710-c853f9d09408" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredCompensationLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrent_19f1653f-2585-4a9c-9710-c853f9d09408" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldInTrustNoncurrent_16e07bd0-0c2b-4dc7-b37b-90c543e9f947" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsHeldInTrustNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_b0f2f46e-b035-4abd-bf64-3456d17fa2eb" xlink:to="loc_us-gaap_AssetsHeldInTrustNoncurrent_16e07bd0-0c2b-4dc7-b37b-90c543e9f947" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/EMPLOYEEBENEFITPLANSChangesinBenefitObligationsandPlanAssetsDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#EMPLOYEEBENEFITPLANSChangesinBenefitObligationsandPlanAssetsDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/EMPLOYEEBENEFITPLANSChangesinBenefitObligationsandPlanAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_740fa13b-59de-436e-bd5d-2659062620f3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2378e503-e303-463c-9d88-0c9eb2fe96ac" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_740fa13b-59de-436e-bd5d-2659062620f3" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2378e503-e303-463c-9d88-0c9eb2fe96ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_0ca6cc11-0824-4bfb-8ef5-ff4ab37bfc45" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2378e503-e303-463c-9d88-0c9eb2fe96ac" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_0ca6cc11-0824-4bfb-8ef5-ff4ab37bfc45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_0ca6cc11-0824-4bfb-8ef5-ff4ab37bfc45_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_0ca6cc11-0824-4bfb-8ef5-ff4ab37bfc45" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_0ca6cc11-0824-4bfb-8ef5-ff4ab37bfc45_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_89b07a60-49fa-44f5-b8ad-edb552146cfc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_0ca6cc11-0824-4bfb-8ef5-ff4ab37bfc45" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_89b07a60-49fa-44f5-b8ad-edb552146cfc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPostretirementHealthCoverageMember_a6fb44f8-dc3a-4f1a-b1ea-666a76eed756" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPostretirementHealthCoverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_89b07a60-49fa-44f5-b8ad-edb552146cfc" xlink:to="loc_us-gaap_DefinedBenefitPostretirementHealthCoverageMember_a6fb44f8-dc3a-4f1a-b1ea-666a76eed756" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_558815bc-ec3f-408f-8a72-e9e32bbe0d87" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_89b07a60-49fa-44f5-b8ad-edb552146cfc" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_558815bc-ec3f-408f-8a72-e9e32bbe0d87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_30c2f8f4-61e0-4330-b541-2fc20b975b04" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_740fa13b-59de-436e-bd5d-2659062620f3" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_30c2f8f4-61e0-4330-b541-2fc20b975b04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_a43b9f2e-8493-428a-b7f9-36a3266dca45" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_30c2f8f4-61e0-4330-b541-2fc20b975b04" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_a43b9f2e-8493-428a-b7f9-36a3266dca45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_213cddee-575b-4be0-859b-4adfc02549b6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_30c2f8f4-61e0-4330-b541-2fc20b975b04" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_213cddee-575b-4be0-859b-4adfc02549b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_1909b898-ee61-4eae-bc42-867f8860764a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_30c2f8f4-61e0-4330-b541-2fc20b975b04" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_1909b898-ee61-4eae-bc42-867f8860764a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant_f9083368-1fce-4919-937f-4dd75096ac2c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_30c2f8f4-61e0-4330-b541-2fc20b975b04" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationContributionsByPlanParticipant_f9083368-1fce-4919-937f-4dd75096ac2c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_ecd509e6-de9d-46b0-a838-64af6cc109b2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_30c2f8f4-61e0-4330-b541-2fc20b975b04" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_ecd509e6-de9d-46b0-a838-64af6cc109b2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_4dfbbff9-bd83-4409-83b1-c883c870ee89" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_30c2f8f4-61e0-4330-b541-2fc20b975b04" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_4dfbbff9-bd83-4409-83b1-c883c870ee89" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation_4ad4e849-2939-46e9-9cee-c9dcca8d8518" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_30c2f8f4-61e0-4330-b541-2fc20b975b04" xlink:to="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation_4ad4e849-2939-46e9-9cee-c9dcca8d8518" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_51b76522-eac1-488c-a4ba-395f1244e2eb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2d6ee864-0866-498a-a6fd-35557cf2eafa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_740fa13b-59de-436e-bd5d-2659062620f3" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2d6ee864-0866-498a-a6fd-35557cf2eafa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_f0c707ba-c5c6-4c84-9fb5-e3f285e74a0b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2d6ee864-0866-498a-a6fd-35557cf2eafa" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_f0c707ba-c5c6-4c84-9fb5-e3f285e74a0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_f131af1f-9822-4a8d-b5e0-de2d065e8dd2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2d6ee864-0866-498a-a6fd-35557cf2eafa" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_f131af1f-9822-4a8d-b5e0-de2d065e8dd2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_46892640-6a53-4700-96c4-3a61e2e8233a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2d6ee864-0866-498a-a6fd-35557cf2eafa" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_46892640-6a53-4700-96c4-3a61e2e8233a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant_6d2fa67f-fd28-46d4-8cda-eb4f156df60f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2d6ee864-0866-498a-a6fd-35557cf2eafa" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant_6d2fa67f-fd28-46d4-8cda-eb4f156df60f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_ff3fb71a-8d9a-4227-9b27-2dbe1acb005c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2d6ee864-0866-498a-a6fd-35557cf2eafa" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_ff3fb71a-8d9a-4227-9b27-2dbe1acb005c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss_ffe5437c-6a1a-46d0-91d9-9c7ef73d2ba9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_2d6ee864-0866-498a-a6fd-35557cf2eafa" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsForeignCurrencyTranslationGainLoss_ffe5437c-6a1a-46d0-91d9-9c7ef73d2ba9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_5380cdda-ea88-4765-8ff3-55085a90332f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/EMPLOYEEBENEFITPLANSAmountsRecognizedinBalanceSheetDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#EMPLOYEEBENEFITPLANSAmountsRecognizedinBalanceSheetDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/EMPLOYEEBENEFITPLANSAmountsRecognizedinBalanceSheetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9ec49479-1a39-4f33-86a4-3be7e7b5e1cb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_54c32f7b-cf66-4173-b2e8-c76dca86df2a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9ec49479-1a39-4f33-86a4-3be7e7b5e1cb" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_54c32f7b-cf66-4173-b2e8-c76dca86df2a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_1be69cde-611f-4c5e-bd59-7b01b0429462" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_54c32f7b-cf66-4173-b2e8-c76dca86df2a" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_1be69cde-611f-4c5e-bd59-7b01b0429462" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_1be69cde-611f-4c5e-bd59-7b01b0429462_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_1be69cde-611f-4c5e-bd59-7b01b0429462" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_1be69cde-611f-4c5e-bd59-7b01b0429462_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_6cd6fb43-6360-4a16-9100-da9c07567b78" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_1be69cde-611f-4c5e-bd59-7b01b0429462" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_6cd6fb43-6360-4a16-9100-da9c07567b78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPostretirementHealthCoverageMember_bacac0d6-6474-495c-ad5f-60f2e9b054cc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPostretirementHealthCoverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_6cd6fb43-6360-4a16-9100-da9c07567b78" xlink:to="loc_us-gaap_DefinedBenefitPostretirementHealthCoverageMember_bacac0d6-6474-495c-ad5f-60f2e9b054cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_16e9ecb6-4cf0-4d61-a7bd-697116915eba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_6cd6fb43-6360-4a16-9100-da9c07567b78" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_16e9ecb6-4cf0-4d61-a7bd-697116915eba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_67c533d0-e1b2-43ec-8737-be7db5cf762f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9ec49479-1a39-4f33-86a4-3be7e7b5e1cb" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_67c533d0-e1b2-43ec-8737-be7db5cf762f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_920e379a-d339-4d47-999e-9849a0541305" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9ec49479-1a39-4f33-86a4-3be7e7b5e1cb" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_920e379a-d339-4d47-999e-9849a0541305" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_4e083a6a-c2fe-49cf-95ac-5fe8a66fca09" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9ec49479-1a39-4f33-86a4-3be7e7b5e1cb" xlink:to="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_4e083a6a-c2fe-49cf-95ac-5fe8a66fca09" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_469f1cc2-bb38-4677-8246-9b2e51da44cb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9ec49479-1a39-4f33-86a4-3be7e7b5e1cb" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_469f1cc2-bb38-4677-8246-9b2e51da44cb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_20a0055a-0535-49ff-909a-b5281d35993e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9ec49479-1a39-4f33-86a4-3be7e7b5e1cb" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_20a0055a-0535-49ff-909a-b5281d35993e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_7758dad7-1d3c-45d3-985f-8fcafd4f61b9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9ec49479-1a39-4f33-86a4-3be7e7b5e1cb" xlink:to="loc_us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_7758dad7-1d3c-45d3-985f-8fcafd4f61b9" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/EMPLOYEEBENEFITPLANSComponentsofNetPeriodicBenefitCostDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#EMPLOYEEBENEFITPLANSComponentsofNetPeriodicBenefitCostDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/EMPLOYEEBENEFITPLANSComponentsofNetPeriodicBenefitCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_43057965-83bc-496f-904d-3c93c1d3108d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_d2206fe6-b747-40fa-8221-efa1447e4260" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_43057965-83bc-496f-904d-3c93c1d3108d" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_d2206fe6-b747-40fa-8221-efa1447e4260" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_31b9d21a-a782-430a-a222-ea9999ec7f42" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_d2206fe6-b747-40fa-8221-efa1447e4260" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_31b9d21a-a782-430a-a222-ea9999ec7f42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_31b9d21a-a782-430a-a222-ea9999ec7f42_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_31b9d21a-a782-430a-a222-ea9999ec7f42" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_31b9d21a-a782-430a-a222-ea9999ec7f42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5cd60029-f6d6-404b-b499-d9b3d97f8805" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_31b9d21a-a782-430a-a222-ea9999ec7f42" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5cd60029-f6d6-404b-b499-d9b3d97f8805" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPostretirementHealthCoverageMember_a76ea7dc-c84c-4596-8210-1074f6452e0f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPostretirementHealthCoverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5cd60029-f6d6-404b-b499-d9b3d97f8805" xlink:to="loc_us-gaap_DefinedBenefitPostretirementHealthCoverageMember_a76ea7dc-c84c-4596-8210-1074f6452e0f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_ba7e5435-1b90-4b32-9649-b29821d49208" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5cd60029-f6d6-404b-b499-d9b3d97f8805" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_ba7e5435-1b90-4b32-9649-b29821d49208" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_0a9106af-34a1-424e-be4f-c25183995074" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_43057965-83bc-496f-904d-3c93c1d3108d" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_0a9106af-34a1-424e-be4f-c25183995074" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_6281c959-34af-46f9-a935-478cbe4a99aa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_43057965-83bc-496f-904d-3c93c1d3108d" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_6281c959-34af-46f9-a935-478cbe4a99aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_9e1fa7bc-9c01-4737-a5ad-b64a8694b171" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_43057965-83bc-496f-904d-3c93c1d3108d" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_9e1fa7bc-9c01-4737-a5ad-b64a8694b171" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_c69211c6-9338-41ff-93e2-665cb3f28d25" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_43057965-83bc-496f-904d-3c93c1d3108d" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_c69211c6-9338-41ff-93e2-665cb3f28d25" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_d8c526c2-52ff-4ab2-8d0f-10ed12cb70b2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_43057965-83bc-496f-904d-3c93c1d3108d" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_d8c526c2-52ff-4ab2-8d0f-10ed12cb70b2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_e5e9e3a7-65ba-46fe-81ee-abb11bf8140b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_43057965-83bc-496f-904d-3c93c1d3108d" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_e5e9e3a7-65ba-46fe-81ee-abb11bf8140b" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/EMPLOYEEBENEFITPLANSEstimatedFutureEmployerContributionsandBenefitPaymentsDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#EMPLOYEEBENEFITPLANSEstimatedFutureEmployerContributionsandBenefitPaymentsDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/EMPLOYEEBENEFITPLANSEstimatedFutureEmployerContributionsandBenefitPaymentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_61b55231-00f2-4a8c-9557-26d947e9a2fd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_438a70bd-85a0-485b-9750-b4d49490c8ec" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_61b55231-00f2-4a8c-9557-26d947e9a2fd" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_438a70bd-85a0-485b-9750-b4d49490c8ec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_2a7069dd-b01c-49e7-a882-8feefe882918" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_438a70bd-85a0-485b-9750-b4d49490c8ec" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_2a7069dd-b01c-49e7-a882-8feefe882918" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_2a7069dd-b01c-49e7-a882-8feefe882918_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_2a7069dd-b01c-49e7-a882-8feefe882918" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_2a7069dd-b01c-49e7-a882-8feefe882918_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_e79a97eb-72b7-43c0-9e67-67821675381c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_2a7069dd-b01c-49e7-a882-8feefe882918" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_e79a97eb-72b7-43c0-9e67-67821675381c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPostretirementHealthCoverageMember_b4e45917-0424-4673-9463-1219b18e7d3e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPostretirementHealthCoverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e79a97eb-72b7-43c0-9e67-67821675381c" xlink:to="loc_us-gaap_DefinedBenefitPostretirementHealthCoverageMember_b4e45917-0424-4673-9463-1219b18e7d3e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_ea66b750-58e9-4ac3-bf16-26cdefb9f595" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e79a97eb-72b7-43c0-9e67-67821675381c" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_ea66b750-58e9-4ac3-bf16-26cdefb9f595" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_efc5394d-fd88-4c94-adb0-f32b463a20fa" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_61b55231-00f2-4a8c-9557-26d947e9a2fd" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_efc5394d-fd88-4c94-adb0-f32b463a20fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_f2241b71-f352-4c4c-ae12-d35395715c5c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_61b55231-00f2-4a8c-9557-26d947e9a2fd" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_f2241b71-f352-4c4c-ae12-d35395715c5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_eda90930-ec1c-45cb-8bbc-8656780699e2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_61b55231-00f2-4a8c-9557-26d947e9a2fd" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_eda90930-ec1c-45cb-8bbc-8656780699e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_550abbea-594e-471a-bacb-cf3fc09a36f6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_61b55231-00f2-4a8c-9557-26d947e9a2fd" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_550abbea-594e-471a-bacb-cf3fc09a36f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_2331e6fe-9a22-4604-bd08-a131584a3ac2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_61b55231-00f2-4a8c-9557-26d947e9a2fd" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_2331e6fe-9a22-4604-bd08-a131584a3ac2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_0a463df2-3bfb-4a64-8c3f-29439805c395" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_61b55231-00f2-4a8c-9557-26d947e9a2fd" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_0a463df2-3bfb-4a64-8c3f-29439805c395" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/EMPLOYEEBENEFITPLANSDefinedBenefitPensionPlansDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#EMPLOYEEBENEFITPLANSDefinedBenefitPensionPlansDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/EMPLOYEEBENEFITPLANSDefinedBenefitPensionPlansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MultiemployerPlansLineItems_abea02a8-1241-49a0-a23c-899aa1255967" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MultiemployerPlansLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfMultiemployerPlansTable_bb401f07-f42a-4c85-b8b7-7240f94d6685" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfMultiemployerPlansTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MultiemployerPlansLineItems_abea02a8-1241-49a0-a23c-899aa1255967" xlink:to="loc_us-gaap_ScheduleOfMultiemployerPlansTable_bb401f07-f42a-4c85-b8b7-7240f94d6685" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameAxis_83534e21-c84b-4006-ae08-c1b20fd3c196" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfMultiemployerPlansTable_bb401f07-f42a-4c85-b8b7-7240f94d6685" xlink:to="loc_us-gaap_RetirementPlanNameAxis_83534e21-c84b-4006-ae08-c1b20fd3c196" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameDomain_83534e21-c84b-4006-ae08-c1b20fd3c196_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanNameAxis_83534e21-c84b-4006-ae08-c1b20fd3c196" xlink:to="loc_us-gaap_RetirementPlanNameDomain_83534e21-c84b-4006-ae08-c1b20fd3c196_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameDomain_7219d495-1d31-4b8d-88bd-52a810e82664" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanNameAxis_83534e21-c84b-4006-ae08-c1b20fd3c196" xlink:to="loc_us-gaap_RetirementPlanNameDomain_7219d495-1d31-4b8d-88bd-52a810e82664" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_CentralStatesSoutheastAndSouthwestAreasPensionFundMember_c79044f3-fbb4-4342-bbed-1718624061fd" xlink:href="bcpc-20241231.xsd#bcpc_CentralStatesSoutheastAndSouthwestAreasPensionFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanNameDomain_7219d495-1d31-4b8d-88bd-52a810e82664" xlink:to="loc_bcpc_CentralStatesSoutheastAndSouthwestAreasPensionFundMember_c79044f3-fbb4-4342-bbed-1718624061fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MultiemployerPlanEmployerContributionCost_ae1c0680-0125-402a-aa98-780900e23f62" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MultiemployerPlanEmployerContributionCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MultiemployerPlansLineItems_abea02a8-1241-49a0-a23c-899aa1255967" xlink:to="loc_us-gaap_MultiemployerPlanEmployerContributionCost_ae1c0680-0125-402a-aa98-780900e23f62" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/EMPLOYEEBENEFITPLANSAssumptionsUsedinCalculationsDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#EMPLOYEEBENEFITPLANSAssumptionsUsedinCalculationsDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/EMPLOYEEBENEFITPLANSAssumptionsUsedinCalculationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14d57b07-4d9c-422e-8f5a-c29e0f1608fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_aed7f35f-10be-44bf-8dad-e1a467cf51f3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14d57b07-4d9c-422e-8f5a-c29e0f1608fe" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_aed7f35f-10be-44bf-8dad-e1a467cf51f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_7e28f0e9-c1cc-4e68-8fd0-43b8f9e58bb1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_aed7f35f-10be-44bf-8dad-e1a467cf51f3" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_7e28f0e9-c1cc-4e68-8fd0-43b8f9e58bb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_7e28f0e9-c1cc-4e68-8fd0-43b8f9e58bb1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_7e28f0e9-c1cc-4e68-8fd0-43b8f9e58bb1" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_7e28f0e9-c1cc-4e68-8fd0-43b8f9e58bb1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_e0b3007c-d002-4ff7-abe9-67fafe1db117" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_7e28f0e9-c1cc-4e68-8fd0-43b8f9e58bb1" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_e0b3007c-d002-4ff7-abe9-67fafe1db117" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_e4df08de-495e-4950-85a9-a870c5ae9d3a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e0b3007c-d002-4ff7-abe9-67fafe1db117" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_e4df08de-495e-4950-85a9-a870c5ae9d3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPostretirementHealthCoverageMember_ea00df35-4ce9-4a37-aa6d-2d97be18e3e7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPostretirementHealthCoverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e0b3007c-d002-4ff7-abe9-67fafe1db117" xlink:to="loc_us-gaap_DefinedBenefitPostretirementHealthCoverageMember_ea00df35-4ce9-4a37-aa6d-2d97be18e3e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_6d02adef-923c-4332-af4a-783f3c9b2b6c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14d57b07-4d9c-422e-8f5a-c29e0f1608fe" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_6d02adef-923c-4332-af4a-783f3c9b2b6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_0878c498-f8bb-428c-87e5-4936b79ccf1f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_6d02adef-923c-4332-af4a-783f3c9b2b6c" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_0878c498-f8bb-428c-87e5-4936b79ccf1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_c9a0f4b9-4272-469f-bb2f-ed5c1d8af680" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14d57b07-4d9c-422e-8f5a-c29e0f1608fe" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_c9a0f4b9-4272-469f-bb2f-ed5c1d8af680" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_bd5bea5e-3917-4419-a9cd-1ae30bcbb48e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_c9a0f4b9-4272-469f-bb2f-ed5c1d8af680" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_bd5bea5e-3917-4419-a9cd-1ae30bcbb48e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_2b0a186d-f58d-43f5-a648-a8b3894bd586" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_c9a0f4b9-4272-469f-bb2f-ed5c1d8af680" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_2b0a186d-f58d-43f5-a648-a8b3894bd586" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/COMMITMENTSANDCONTINGENCIESNarrativeDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#COMMITMENTSANDCONTINGENCIESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/COMMITMENTSANDCONTINGENCIESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainContingenciesLineItems_f03c98f7-19e7-472a-8fd7-768cb066981b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GainContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainContingenciesTable_22abed5c-1c3d-41dd-96ce-ab66e1e5e175" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_GainContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GainContingenciesLineItems_f03c98f7-19e7-472a-8fd7-768cb066981b" xlink:to="loc_us-gaap_GainContingenciesTable_22abed5c-1c3d-41dd-96ce-ab66e1e5e175" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_ff7504d2-13ab-4d00-80c6-e8f7338f09bc" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_GainContingenciesTable_22abed5c-1c3d-41dd-96ce-ab66e1e5e175" xlink:to="loc_srt_LitigationCaseAxis_ff7504d2-13ab-4d00-80c6-e8f7338f09bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_ff7504d2-13ab-4d00-80c6-e8f7338f09bc_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_ff7504d2-13ab-4d00-80c6-e8f7338f09bc" xlink:to="loc_srt_LitigationCaseTypeDomain_ff7504d2-13ab-4d00-80c6-e8f7338f09bc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_d8fcff79-bf66-45fa-af7d-af71a3963f63" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_ff7504d2-13ab-4d00-80c6-e8f7338f09bc" xlink:to="loc_srt_LitigationCaseTypeDomain_d8fcff79-bf66-45fa-af7d-af71a3963f63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_U.S.EnvironmentalProtectionAgencyCivilPenaltyMember_c79741c5-491b-47c2-b30c-567b62629fb0" xlink:href="bcpc-20241231.xsd#bcpc_U.S.EnvironmentalProtectionAgencyCivilPenaltyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_d8fcff79-bf66-45fa-af7d-af71a3963f63" xlink:to="loc_bcpc_U.S.EnvironmentalProtectionAgencyCivilPenaltyMember_c79741c5-491b-47c2-b30c-567b62629fb0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_U.S.EnvironmentalProtectionAgencyCommunitySpendingMember_da1cdc71-7883-4c2d-b945-d6a2cb2c43fe" xlink:href="bcpc-20241231.xsd#bcpc_U.S.EnvironmentalProtectionAgencyCommunitySpendingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_d8fcff79-bf66-45fa-af7d-af71a3963f63" xlink:to="loc_bcpc_U.S.EnvironmentalProtectionAgencyCommunitySpendingMember_da1cdc71-7883-4c2d-b945-d6a2cb2c43fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_958f908f-b563-44b4-bd24-6cfea1145cb0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_GainContingenciesTable_22abed5c-1c3d-41dd-96ce-ab66e1e5e175" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_958f908f-b563-44b4-bd24-6cfea1145cb0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_958f908f-b563-44b4-bd24-6cfea1145cb0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_958f908f-b563-44b4-bd24-6cfea1145cb0" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_958f908f-b563-44b4-bd24-6cfea1145cb0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_d7879d38-cdbb-4a75-8499-157d952bb338" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_958f908f-b563-44b4-bd24-6cfea1145cb0" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_d7879d38-cdbb-4a75-8499-157d952bb338" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_3fe2bd78-545d-43d2-89dd-4004b22196fb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_d7879d38-cdbb-4a75-8499-157d952bb338" xlink:to="loc_us-gaap_SubsequentEventMember_3fe2bd78-545d-43d2-89dd-4004b22196fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_0c3e8a4c-339f-4f11-97c2-bf499aede313" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GainContingenciesLineItems_f03c98f7-19e7-472a-8fd7-768cb066981b" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_0c3e8a4c-339f-4f11-97c2-bf499aede313" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/FAIRVALUEOFFINANCIALINSTRUMENTSDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#FAIRVALUEOFFINANCIALINSTRUMENTSDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/FAIRVALUEOFFINANCIALINSTRUMENTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4e647b9f-63a2-4450-bf10-b8a83b5c34ca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5bbbff76-a137-4115-9afe-63852fd7e40a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4e647b9f-63a2-4450-bf10-b8a83b5c34ca" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5bbbff76-a137-4115-9afe-63852fd7e40a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_89bd2e65-b644-441f-95fd-334345169fd7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5bbbff76-a137-4115-9afe-63852fd7e40a" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_89bd2e65-b644-441f-95fd-334345169fd7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_89bd2e65-b644-441f-95fd-334345169fd7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_89bd2e65-b644-441f-95fd-334345169fd7" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_89bd2e65-b644-441f-95fd-334345169fd7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_e4b53f8f-a91c-472e-a014-048a74690c1f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_89bd2e65-b644-441f-95fd-334345169fd7" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_e4b53f8f-a91c-472e-a014-048a74690c1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_586cda93-151c-45f5-b460-8037ec7c3a9a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_e4b53f8f-a91c-472e-a014-048a74690c1f" xlink:to="loc_us-gaap_MoneyMarketFundsMember_586cda93-151c-45f5-b460-8037ec7c3a9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f255643a-fee2-46ab-8e70-e66db3c6e7bc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5bbbff76-a137-4115-9afe-63852fd7e40a" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f255643a-fee2-46ab-8e70-e66db3c6e7bc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f255643a-fee2-46ab-8e70-e66db3c6e7bc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f255643a-fee2-46ab-8e70-e66db3c6e7bc" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f255643a-fee2-46ab-8e70-e66db3c6e7bc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0a062cb4-2c43-4560-81ab-0efb24d19362" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f255643a-fee2-46ab-8e70-e66db3c6e7bc" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0a062cb4-2c43-4560-81ab-0efb24d19362" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_8e85e3ab-0d20-4719-b38e-69833ae1cabc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0a062cb4-2c43-4560-81ab-0efb24d19362" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_8e85e3ab-0d20-4719-b38e-69833ae1cabc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_FinancialInstrumentsNumberOfFinancialInstrumentsHeldForTradingPurposes_42ffadc4-9f94-45fd-aa97-343653033160" xlink:href="bcpc-20241231.xsd#bcpc_FinancialInstrumentsNumberOfFinancialInstrumentsHeldForTradingPurposes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4e647b9f-63a2-4450-bf10-b8a83b5c34ca" xlink:to="loc_bcpc_FinancialInstrumentsNumberOfFinancialInstrumentsHeldForTradingPurposes_42ffadc4-9f94-45fd-aa97-343653033160" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_43d6b7c3-764d-40b3-9ea5-89aa094989a6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4e647b9f-63a2-4450-bf10-b8a83b5c34ca" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_43d6b7c3-764d-40b3-9ea5-89aa094989a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldInTrustNoncurrent_5eafb6e2-e0e2-4708-be62-1696607ace68" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsHeldInTrustNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4e647b9f-63a2-4450-bf10-b8a83b5c34ca" xlink:to="loc_us-gaap_AssetsHeldInTrustNoncurrent_5eafb6e2-e0e2-4708-be62-1696607ace68" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/RELATEDPARTYTRANSACTIONSDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#RELATEDPARTYTRANSACTIONSDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/RELATEDPARTYTRANSACTIONSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_df08d1ed-485d-4ee5-beef-3bf4f7bfcfed" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9a9ef24a-2795-471c-be05-71330485db1b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_df08d1ed-485d-4ee5-beef-3bf4f7bfcfed" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9a9ef24a-2795-471c-be05-71330485db1b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f2166b3e-94c0-45db-be52-92d388d3aebb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9a9ef24a-2795-471c-be05-71330485db1b" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f2166b3e-94c0-45db-be52-92d388d3aebb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_f2166b3e-94c0-45db-be52-92d388d3aebb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f2166b3e-94c0-45db-be52-92d388d3aebb" xlink:to="loc_us-gaap_RelatedPartyDomain_f2166b3e-94c0-45db-be52-92d388d3aebb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_b5c0b368-e1e5-485f-b2b8-79e166bd8625" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f2166b3e-94c0-45db-be52-92d388d3aebb" xlink:to="loc_us-gaap_RelatedPartyDomain_b5c0b368-e1e5-485f-b2b8-79e166bd8625" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateJointVentureMember_77384cb7-777b-40d1-b897-353e88fc0484" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CorporateJointVentureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_b5c0b368-e1e5-485f-b2b8-79e166bd8625" xlink:to="loc_us-gaap_CorporateJointVentureMember_77384cb7-777b-40d1-b897-353e88fc0484" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_4789c5da-6074-4646-bd22-d4c151e3d71a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9a9ef24a-2795-471c-be05-71330485db1b" xlink:to="loc_srt_ProductOrServiceAxis_4789c5da-6074-4646-bd22-d4c151e3d71a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_4789c5da-6074-4646-bd22-d4c151e3d71a_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_4789c5da-6074-4646-bd22-d4c151e3d71a" xlink:to="loc_srt_ProductsAndServicesDomain_4789c5da-6074-4646-bd22-d4c151e3d71a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_70b96667-c823-40e9-b9b1-adeae78ef047" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_4789c5da-6074-4646-bd22-d4c151e3d71a" xlink:to="loc_srt_ProductsAndServicesDomain_70b96667-c823-40e9-b9b1-adeae78ef047" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_ServicesProvidedMember_dbe921ad-5927-4969-9b74-df0afea5f3da" xlink:href="bcpc-20241231.xsd#bcpc_ServicesProvidedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_70b96667-c823-40e9-b9b1-adeae78ef047" xlink:to="loc_bcpc_ServicesProvidedMember_dbe921ad-5927-4969-9b74-df0afea5f3da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_RawMaterialsSoldMember_8620d4c9-20e3-4c22-b58b-50177530dd81" xlink:href="bcpc-20241231.xsd#bcpc_RawMaterialsSoldMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_70b96667-c823-40e9-b9b1-adeae78ef047" xlink:to="loc_bcpc_RawMaterialsSoldMember_8620d4c9-20e3-4c22-b58b-50177530dd81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_cad2c54c-4b29-406a-816b-f3ce754c5610" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9a9ef24a-2795-471c-be05-71330485db1b" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_cad2c54c-4b29-406a-816b-f3ce754c5610" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_cad2c54c-4b29-406a-816b-f3ce754c5610_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_cad2c54c-4b29-406a-816b-f3ce754c5610" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_cad2c54c-4b29-406a-816b-f3ce754c5610_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_799f6ee0-ec04-4a6f-bbe1-c660fe68b24e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_cad2c54c-4b29-406a-816b-f3ce754c5610" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_799f6ee0-ec04-4a6f-bbe1-c660fe68b24e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_NonContractualMoniesOwedMember_32bf3687-f0df-4842-a69c-ee39fd5a29ac" xlink:href="bcpc-20241231.xsd#bcpc_NonContractualMoniesOwedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_799f6ee0-ec04-4a6f-bbe1-c660fe68b24e" xlink:to="loc_bcpc_NonContractualMoniesOwedMember_32bf3687-f0df-4842-a69c-ee39fd5a29ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f70b78f9-e974-44bb-9b5a-524f593e6a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_df08d1ed-485d-4ee5-beef-3bf4f7bfcfed" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f70b78f9-e974-44bb-9b5a-524f593e6a4e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_af3de34e-54d5-4d15-9aeb-0716a88603f6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_df08d1ed-485d-4ee5-beef-3bf4f7bfcfed" xlink:to="loc_us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_af3de34e-54d5-4d15-9aeb-0716a88603f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_9ba8777e-c136-4d5f-8a9f-38e7ab095cd4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_df08d1ed-485d-4ee5-beef-3bf4f7bfcfed" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_9ba8777e-c136-4d5f-8a9f-38e7ab095cd4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableTradeCurrent_31c1dd86-44cb-4f4f-be3f-e620647dd6dc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsPayableTradeCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_df08d1ed-485d-4ee5-beef-3bf4f7bfcfed" xlink:to="loc_us-gaap_AccountsPayableTradeCurrent_31c1dd86-44cb-4f4f-be3f-e620647dd6dc" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/LEASESNarrativeDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#LEASESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/LEASESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_72627e22-43f3-439c-8e43-d7b639f6e29a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_576c7c3e-93ed-4929-9d23-6513fa271023" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_72627e22-43f3-439c-8e43-d7b639f6e29a" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_576c7c3e-93ed-4929-9d23-6513fa271023" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_LesseeOperatingLeaseTranchesAxis_d1fb8278-3384-4989-9099-f6427044b3ad" xlink:href="bcpc-20241231.xsd#bcpc_LesseeOperatingLeaseTranchesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_576c7c3e-93ed-4929-9d23-6513fa271023" xlink:to="loc_bcpc_LesseeOperatingLeaseTranchesAxis_d1fb8278-3384-4989-9099-f6427044b3ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_LesseeOperatingLeaseTranchesDomain_d1fb8278-3384-4989-9099-f6427044b3ad_default" xlink:href="bcpc-20241231.xsd#bcpc_LesseeOperatingLeaseTranchesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_bcpc_LesseeOperatingLeaseTranchesAxis_d1fb8278-3384-4989-9099-f6427044b3ad" xlink:to="loc_bcpc_LesseeOperatingLeaseTranchesDomain_d1fb8278-3384-4989-9099-f6427044b3ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_LesseeOperatingLeaseTranchesDomain_46d300e0-94d3-42f9-ac1b-1d4439e94918" xlink:href="bcpc-20241231.xsd#bcpc_LesseeOperatingLeaseTranchesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_bcpc_LesseeOperatingLeaseTranchesAxis_d1fb8278-3384-4989-9099-f6427044b3ad" xlink:to="loc_bcpc_LesseeOperatingLeaseTranchesDomain_46d300e0-94d3-42f9-ac1b-1d4439e94918" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_LesseeOperatingLeaseTrancheOneMember_e9f0ff79-1290-46a2-8cb7-ae5d5565bb40" xlink:href="bcpc-20241231.xsd#bcpc_LesseeOperatingLeaseTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bcpc_LesseeOperatingLeaseTranchesDomain_46d300e0-94d3-42f9-ac1b-1d4439e94918" xlink:to="loc_bcpc_LesseeOperatingLeaseTrancheOneMember_e9f0ff79-1290-46a2-8cb7-ae5d5565bb40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_LesseeOperatingLeaseTrancheTwoMember_e5e0676b-9637-4ff9-abb5-5b0a8690e790" xlink:href="bcpc-20241231.xsd#bcpc_LesseeOperatingLeaseTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bcpc_LesseeOperatingLeaseTranchesDomain_46d300e0-94d3-42f9-ac1b-1d4439e94918" xlink:to="loc_bcpc_LesseeOperatingLeaseTrancheTwoMember_e5e0676b-9637-4ff9-abb5-5b0a8690e790" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_LesseeOperatingLeaseTrancheThreeMember_03fc98d6-76fd-4314-b41f-7393fdd1a3ae" xlink:href="bcpc-20241231.xsd#bcpc_LesseeOperatingLeaseTrancheThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bcpc_LesseeOperatingLeaseTranchesDomain_46d300e0-94d3-42f9-ac1b-1d4439e94918" xlink:to="loc_bcpc_LesseeOperatingLeaseTrancheThreeMember_03fc98d6-76fd-4314-b41f-7393fdd1a3ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_LesseeOperatingLeaseTrancheFourMember_a7c9d37b-6ad4-4a65-8585-e6e8c3b07cf9" xlink:href="bcpc-20241231.xsd#bcpc_LesseeOperatingLeaseTrancheFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bcpc_LesseeOperatingLeaseTranchesDomain_46d300e0-94d3-42f9-ac1b-1d4439e94918" xlink:to="loc_bcpc_LesseeOperatingLeaseTrancheFourMember_a7c9d37b-6ad4-4a65-8585-e6e8c3b07cf9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_2103e041-c464-430a-9517-6805ad9516ec" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_576c7c3e-93ed-4929-9d23-6513fa271023" xlink:to="loc_srt_RangeAxis_2103e041-c464-430a-9517-6805ad9516ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2103e041-c464-430a-9517-6805ad9516ec_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_2103e041-c464-430a-9517-6805ad9516ec" xlink:to="loc_srt_RangeMember_2103e041-c464-430a-9517-6805ad9516ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_8b917db5-a5f2-426f-974b-766653958381" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_2103e041-c464-430a-9517-6805ad9516ec" xlink:to="loc_srt_RangeMember_8b917db5-a5f2-426f-974b-766653958381" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_ef7dac28-cb30-4a94-8558-c4b9313231dd" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8b917db5-a5f2-426f-974b-766653958381" xlink:to="loc_srt_MinimumMember_ef7dac28-cb30-4a94-8558-c4b9313231dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_749a82e2-7470-4a81-9248-49a5c3faad06" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8b917db5-a5f2-426f-974b-766653958381" xlink:to="loc_srt_MaximumMember_749a82e2-7470-4a81-9248-49a5c3faad06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_LesseeOperatingLeaseRemainingRenewalLeaseTermReasonableThresholdPeriod_c253d089-22fa-49b6-84c5-987582faccc8" xlink:href="bcpc-20241231.xsd#bcpc_LesseeOperatingLeaseRemainingRenewalLeaseTermReasonableThresholdPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_72627e22-43f3-439c-8e43-d7b639f6e29a" xlink:to="loc_bcpc_LesseeOperatingLeaseRemainingRenewalLeaseTermReasonableThresholdPeriod_c253d089-22fa-49b6-84c5-987582faccc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_LesseeOperatingLeaseNumberOfTranches_46fc5a8a-a667-4738-b130-9dafa0af9b86" xlink:href="bcpc-20241231.xsd#bcpc_LesseeOperatingLeaseNumberOfTranches"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_72627e22-43f3-439c-8e43-d7b639f6e29a" xlink:to="loc_bcpc_LesseeOperatingLeaseNumberOfTranches_46fc5a8a-a667-4738-b130-9dafa0af9b86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_7548c62f-09d7-492a-a390-a7cb82f13d0b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_72627e22-43f3-439c-8e43-d7b639f6e29a" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_7548c62f-09d7-492a-a390-a7cb82f13d0b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseDiscountRate_dfd20900-b07a-4675-bbb2-9e6f6d01129c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LesseeOperatingLeaseDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_72627e22-43f3-439c-8e43-d7b639f6e29a" xlink:to="loc_us-gaap_LesseeOperatingLeaseDiscountRate_dfd20900-b07a-4675-bbb2-9e6f6d01129c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_275b236f-4de9-43ad-aa3f-82c5d3504794" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_72627e22-43f3-439c-8e43-d7b639f6e29a" xlink:to="loc_us-gaap_OperatingLeaseCost_275b236f-4de9-43ad-aa3f-82c5d3504794" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/DERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIESNarrativeDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#DERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/DERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_537d5ccf-827d-4bee-9659-76379fec04a6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_e55a5859-b6d2-4960-a15d-9a913cd49729" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_537d5ccf-827d-4bee-9659-76379fec04a6" xlink:to="loc_us-gaap_DerivativeTable_e55a5859-b6d2-4960-a15d-9a913cd49729" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_bd0c8182-04ba-4fcb-8531-4681f6235b47" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e55a5859-b6d2-4960-a15d-9a913cd49729" xlink:to="loc_us-gaap_HedgingDesignationAxis_bd0c8182-04ba-4fcb-8531-4681f6235b47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_bd0c8182-04ba-4fcb-8531-4681f6235b47_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_bd0c8182-04ba-4fcb-8531-4681f6235b47" xlink:to="loc_us-gaap_HedgingDesignationDomain_bd0c8182-04ba-4fcb-8531-4681f6235b47_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_0bfe5f8f-3b81-48c0-a93a-efb6b5085599" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_bd0c8182-04ba-4fcb-8531-4681f6235b47" xlink:to="loc_us-gaap_HedgingDesignationDomain_0bfe5f8f-3b81-48c0-a93a-efb6b5085599" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_fd601edf-c127-47a6-a3ef-516a1f5b3047" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_0bfe5f8f-3b81-48c0-a93a-efb6b5085599" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_fd601edf-c127-47a6-a3ef-516a1f5b3047" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_cea90907-c4d7-4d1c-8a81-e081f0afd7b3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e55a5859-b6d2-4960-a15d-9a913cd49729" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_cea90907-c4d7-4d1c-8a81-e081f0afd7b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_cea90907-c4d7-4d1c-8a81-e081f0afd7b3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_cea90907-c4d7-4d1c-8a81-e081f0afd7b3" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_cea90907-c4d7-4d1c-8a81-e081f0afd7b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_8013c727-e3d9-425a-99cc-06aee7ee7f4d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_cea90907-c4d7-4d1c-8a81-e081f0afd7b3" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_8013c727-e3d9-425a-99cc-06aee7ee7f4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_93717d9d-f59a-42ae-bfaf-8e00aff20c01" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_8013c727-e3d9-425a-99cc-06aee7ee7f4d" xlink:to="loc_us-gaap_InterestRateSwapMember_93717d9d-f59a-42ae-bfaf-8e00aff20c01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember_81cff4b9-2803-47d4-a702-3f17f87e22dd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrencySwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_8013c727-e3d9-425a-99cc-06aee7ee7f4d" xlink:to="loc_us-gaap_CurrencySwapMember_81cff4b9-2803-47d4-a702-3f17f87e22dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForwardContractsMember_b81da082-69db-4230-bbf0-30e8a35d0c73" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForwardContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_8013c727-e3d9-425a-99cc-06aee7ee7f4d" xlink:to="loc_us-gaap_ForwardContractsMember_b81da082-69db-4230-bbf0-30e8a35d0c73" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_4f1be8c2-6a92-4a58-aedc-2d0e978ca253" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e55a5859-b6d2-4960-a15d-9a913cd49729" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_4f1be8c2-6a92-4a58-aedc-2d0e978ca253" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_4f1be8c2-6a92-4a58-aedc-2d0e978ca253_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_4f1be8c2-6a92-4a58-aedc-2d0e978ca253" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_4f1be8c2-6a92-4a58-aedc-2d0e978ca253_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_3abf364c-0d39-4d85-93f5-c2e1f2180bad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_4f1be8c2-6a92-4a58-aedc-2d0e978ca253" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_3abf364c-0d39-4d85-93f5-c2e1f2180bad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseMember_4c81bba4-1265-4478-9cdc-bc083891e3dc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_3abf364c-0d39-4d85-93f5-c2e1f2180bad" xlink:to="loc_us-gaap_InterestExpenseMember_4c81bba4-1265-4478-9cdc-bc083891e3dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_DerivativeInterestRateTypeAxis_14f2cc75-cf0b-4b0d-adc4-8a42ebd3a120" xlink:href="bcpc-20241231.xsd#bcpc_DerivativeInterestRateTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e55a5859-b6d2-4960-a15d-9a913cd49729" xlink:to="loc_bcpc_DerivativeInterestRateTypeAxis_14f2cc75-cf0b-4b0d-adc4-8a42ebd3a120" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_DerivativeInterestRateTypeDomain_14f2cc75-cf0b-4b0d-adc4-8a42ebd3a120_default" xlink:href="bcpc-20241231.xsd#bcpc_DerivativeInterestRateTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_bcpc_DerivativeInterestRateTypeAxis_14f2cc75-cf0b-4b0d-adc4-8a42ebd3a120" xlink:to="loc_bcpc_DerivativeInterestRateTypeDomain_14f2cc75-cf0b-4b0d-adc4-8a42ebd3a120_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_DerivativeInterestRateTypeDomain_b2c8ca9c-9371-4f8d-b6bc-c48f633227cd" xlink:href="bcpc-20241231.xsd#bcpc_DerivativeInterestRateTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_bcpc_DerivativeInterestRateTypeAxis_14f2cc75-cf0b-4b0d-adc4-8a42ebd3a120" xlink:to="loc_bcpc_DerivativeInterestRateTypeDomain_b2c8ca9c-9371-4f8d-b6bc-c48f633227cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_PayFixedInterestRateMember_56a035e2-9f57-439a-9b3f-74ffa0bb3f18" xlink:href="bcpc-20241231.xsd#bcpc_PayFixedInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bcpc_DerivativeInterestRateTypeDomain_b2c8ca9c-9371-4f8d-b6bc-c48f633227cd" xlink:to="loc_bcpc_PayFixedInterestRateMember_56a035e2-9f57-439a-9b3f-74ffa0bb3f18" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bcpc_ReceiveFixedInterestRateMember_41d295e9-49b1-4cea-b8ab-a2faf424d7bd" xlink:href="bcpc-20241231.xsd#bcpc_ReceiveFixedInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bcpc_DerivativeInterestRateTypeDomain_b2c8ca9c-9371-4f8d-b6bc-c48f633227cd" xlink:to="loc_bcpc_ReceiveFixedInterestRateMember_41d295e9-49b1-4cea-b8ab-a2faf424d7bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFixedInterestRate_7cc241c4-564b-43c6-a45c-70402aa4c59f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeFixedInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_537d5ccf-827d-4bee-9659-76379fec04a6" xlink:to="loc_us-gaap_DerivativeFixedInterestRate_7cc241c4-564b-43c6-a45c-70402aa4c59f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNotionalAmount_cba071b6-e933-434a-b1dc-0abec67d4163" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeLiabilityNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_537d5ccf-827d-4bee-9659-76379fec04a6" xlink:to="loc_us-gaap_DerivativeLiabilityNotionalAmount_cba071b6-e933-434a-b1dc-0abec67d4163" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_7bc51f5f-8c3f-4976-a304-44579a685be1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_537d5ccf-827d-4bee-9659-76379fec04a6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_7bc51f5f-8c3f-4976-a304-44579a685be1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromHedgeInvestingActivities_29972c95-e308-45c7-930e-009a9d55f128" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsForProceedsFromHedgeInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_537d5ccf-827d-4bee-9659-76379fec04a6" xlink:to="loc_us-gaap_PaymentsForProceedsFromHedgeInvestingActivities_29972c95-e308-45c7-930e-009a9d55f128" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_b1f5c6be-c5da-4a4d-b663-88ebe760d402" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeNumberOfInstrumentsHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_537d5ccf-827d-4bee-9659-76379fec04a6" xlink:to="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_b1f5c6be-c5da-4a4d-b663-88ebe760d402" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_6b96f317-940c-409c-912f-c115d16b40e8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_537d5ccf-827d-4bee-9659-76379fec04a6" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_6b96f317-940c-409c-912f-c115d16b40e8" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/DERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIESScheduleofGainsLossesonHedgingInstrumentsDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#DERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIESScheduleofGainsLossesonHedgingInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/DERIVATIVEINSTRUMENTSANDHEDGINGACTIVITIESScheduleofGainsLossesonHedgingInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_8b3dde99-d267-457e-a39b-5cabc8be84ef" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_0e003c1b-6d33-4b5a-b2d2-49186f077bd6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_8b3dde99-d267-457e-a39b-5cabc8be84ef" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_0e003c1b-6d33-4b5a-b2d2-49186f077bd6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_e0c7a725-b4b2-42bb-856c-705b98ce81f3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_0e003c1b-6d33-4b5a-b2d2-49186f077bd6" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_e0c7a725-b4b2-42bb-856c-705b98ce81f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_e0c7a725-b4b2-42bb-856c-705b98ce81f3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_e0c7a725-b4b2-42bb-856c-705b98ce81f3" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_e0c7a725-b4b2-42bb-856c-705b98ce81f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_ac6c7a77-e555-4df6-9eb3-d36ed9c6c5dc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_e0c7a725-b4b2-42bb-856c-705b98ce81f3" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_ac6c7a77-e555-4df6-9eb3-d36ed9c6c5dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_9d9f25aa-ba04-4585-bc49-6d7452b9a125" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_ac6c7a77-e555-4df6-9eb3-d36ed9c6c5dc" xlink:to="loc_us-gaap_InterestRateSwapMember_9d9f25aa-ba04-4585-bc49-6d7452b9a125" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember_8e394673-552e-4e26-bb56-8cdead7b2206" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CurrencySwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_ac6c7a77-e555-4df6-9eb3-d36ed9c6c5dc" xlink:to="loc_us-gaap_CurrencySwapMember_8e394673-552e-4e26-bb56-8cdead7b2206" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_3dea3bc8-d81b-41b1-b08b-72b4024f959d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_8b3dde99-d267-457e-a39b-5cabc8be84ef" xlink:to="loc_us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_3dea3bc8-d81b-41b1-b08b-72b4024f959d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_5e1d73b8-b9f9-4cfc-8dd9-7b7d5fd9bcd0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_8b3dde99-d267-457e-a39b-5cabc8be84ef" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_5e1d73b8-b9f9-4cfc-8dd9-7b7d5fd9bcd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_06d54533-995b-4689-8a22-3f269ff0ef92" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_8b3dde99-d267-457e-a39b-5cabc8be84ef" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_06d54533-995b-4689-8a22-3f269ff0ef92" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_11fd22d8-283a-4243-ad5c-91401858a6f9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_8b3dde99-d267-457e-a39b-5cabc8be84ef" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_11fd22d8-283a-4243-ad5c-91401858a6f9" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://balchem.com/role/VALUATIONANDQUALIFYINGACCOUNTSDetails" xlink:type="simple" xlink:href="bcpc-20241231.xsd#VALUATIONANDQUALIFYINGACCOUNTSDetails"/>
  <link:definitionLink xlink:role="http://balchem.com/role/VALUATIONANDQUALIFYINGACCOUNTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_50dfb5eb-16cc-4d7b-8fd1-30c19960d74d" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_d08f5441-af85-4bf2-bddc-05e9732e2c05" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_50dfb5eb-16cc-4d7b-8fd1-30c19960d74d" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_d08f5441-af85-4bf2-bddc-05e9732e2c05" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_6bf96229-309a-4362-ae1a-0d0e8b92c65f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_d08f5441-af85-4bf2-bddc-05e9732e2c05" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_6bf96229-309a-4362-ae1a-0d0e8b92c65f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_6bf96229-309a-4362-ae1a-0d0e8b92c65f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_6bf96229-309a-4362-ae1a-0d0e8b92c65f" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_6bf96229-309a-4362-ae1a-0d0e8b92c65f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_58827574-6e46-4fc5-85bb-5ddeefd21dae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_6bf96229-309a-4362-ae1a-0d0e8b92c65f" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_58827574-6e46-4fc5-85bb-5ddeefd21dae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForCreditLossMember_45bc82c1-d602-4292-bc69-31af84d6fa9f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllowanceForCreditLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_58827574-6e46-4fc5-85bb-5ddeefd21dae" xlink:to="loc_us-gaap_AllowanceForCreditLossMember_45bc82c1-d602-4292-bc69-31af84d6fa9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryValuationReserveMember_27c6a92e-a979-4269-899a-3b8ded458df3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InventoryValuationReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_58827574-6e46-4fc5-85bb-5ddeefd21dae" xlink:to="loc_us-gaap_InventoryValuationReserveMember_27c6a92e-a979-4269-899a-3b8ded458df3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_416a6bee-53c5-409c-bd0f-b9d926bf5d78" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_50dfb5eb-16cc-4d7b-8fd1-30c19960d74d" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_416a6bee-53c5-409c-bd0f-b9d926bf5d78" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_35f76da0-6f1f-4899-98df-b52c7f4a46d4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_416a6bee-53c5-409c-bd0f-b9d926bf5d78" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_35f76da0-6f1f-4899-98df-b52c7f4a46d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_d4e95c98-7e6b-4e68-a907-45f92df8b4e0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_416a6bee-53c5-409c-bd0f-b9d926bf5d78" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_d4e95c98-7e6b-4e68-a907-45f92df8b4e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_e59b16f9-8902-4af0-87c1-35b883a5990c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationAllowancesAndReservesDeductions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_416a6bee-53c5-409c-bd0f-b9d926bf5d78" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_e59b16f9-8902-4af0-87c1-35b883a5990c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_9e2930ce-0d98-47bb-8620-4671bdb7845e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-roles-2024.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent" xlink:type="arc" order="691"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" xlink:type="arc" order="692"/>
  </link:definitionLink>
</link:linkbase>
