<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e89f7-335b-7ea9-89d0-7329d63da3d8,g:863c9705-3bdf-4343-ad32-e70f99b514b4-->
<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://tejonranch.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="trc-20260630.xsd#CONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e89f7-34fe-7ce3-b619-be48e52d4790" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e89f7-34fe-72a9-b178-0e4ccd9762c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-7ce3-b619-be48e52d4790" xlink:to="loc_us-gaap_StatementTable_019e89f7-34fe-72a9-b178-0e4ccd9762c2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e89f7-34fe-7350-a957-815a0ac211b8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e89f7-34fe-72a9-b178-0e4ccd9762c2" xlink:to="loc_srt_CounterpartyNameAxis_019e89f7-34fe-7350-a957-815a0ac211b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-34fe-7350-a957-815a0ac211b8_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-34fe-7350-a957-815a0ac211b8" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-34fe-7350-a957-815a0ac211b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-34fe-73c6-a7f4-44b167f24c46" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-34fe-7350-a957-815a0ac211b8" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-34fe-73c6-a7f4-44b167f24c46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_CentennialFoundersLlcMember_019e89f7-34fe-7d4f-9b27-ef32f31ebe47" xlink:href="trc-20260630.xsd#trc_CentennialFoundersLlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-34fe-73c6-a7f4-44b167f24c46" xlink:to="loc_trc_CentennialFoundersLlcMember_019e89f7-34fe-7d4f-9b27-ef32f31ebe47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts_019e89f7-34fe-7bdb-88dd-86ca6c67b1be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-7ce3-b619-be48e52d4790" xlink:to="loc_us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts_019e89f7-34fe-7bdb-88dd-86ca6c67b1be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e89f7-34fe-7c8f-b824-f3cd901f2dbc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-7ce3-b619-be48e52d4790" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e89f7-34fe-7c8f-b824-f3cd901f2dbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019e89f7-34fe-790c-b0cc-98f71395587a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-7ce3-b619-be48e52d4790" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019e89f7-34fe-790c-b0cc-98f71395587a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019e89f7-34fe-7e07-8865-d91a4d92892e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-7ce3-b619-be48e52d4790" xlink:to="loc_us-gaap_CommonStockSharesIssued_019e89f7-34fe-7e07-8865-d91a4d92892e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e89f7-34fe-76b9-afca-c86a128ecaeb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-7ce3-b619-be48e52d4790" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e89f7-34fe-76b9-afca-c86a128ecaeb" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/UNAUDITEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="trc-20260630.xsd#UNAUDITEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/UNAUDITEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e89f7-34fe-761f-b344-a2f95c70dd16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_StatementTable_019e89f7-34fe-761f-b344-a2f95c70dd16" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f7-34fe-7f56-acdb-929210baa5f0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e89f7-34fe-761f-b344-a2f95c70dd16" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f7-34fe-7f56-acdb-929210baa5f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-34fe-7f56-acdb-929210baa5f0_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-34fe-7f56-acdb-929210baa5f0" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-34fe-7f56-acdb-929210baa5f0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-34fe-781e-8c86-b7fd95847d29" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-34fe-7f56-acdb-929210baa5f0" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-34fe-781e-8c86-b7fd95847d29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f7-34fe-718a-bf25-3eb9aae52a15" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-34fe-781e-8c86-b7fd95847d29" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f7-34fe-718a-bf25-3eb9aae52a15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019e89f7-34fe-7ba1-8fa2-3e6c5e1a351c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-34fe-781e-8c86-b7fd95847d29" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019e89f7-34fe-7ba1-8fa2-3e6c5e1a351c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-34fe-77cd-aa06-ad3175d40a82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e89f7-34fe-761f-b344-a2f95c70dd16" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-34fe-77cd-aa06-ad3175d40a82" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-34fe-77cd-aa06-ad3175d40a82_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-34fe-77cd-aa06-ad3175d40a82" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-34fe-77cd-aa06-ad3175d40a82_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-34fe-7359-90be-76a6bfe96baf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-34fe-77cd-aa06-ad3175d40a82" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-34fe-7359-90be-76a6bfe96baf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_CommercialAndIndustrialMember_019e89f7-34fe-7d0c-b30a-b1644bd30d13" xlink:href="trc-20260630.xsd#trc_CommercialAndIndustrialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-34fe-7359-90be-76a6bfe96baf" xlink:to="loc_trc_CommercialAndIndustrialMember_019e89f7-34fe-7d0c-b30a-b1644bd30d13" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_MultifamilySegmentMember_019e89f7-34fe-70e8-82fc-db90384a492a" xlink:href="trc-20260630.xsd#trc_MultifamilySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-34fe-7359-90be-76a6bfe96baf" xlink:to="loc_trc_MultifamilySegmentMember_019e89f7-34fe-70e8-82fc-db90384a492a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_MineralResourcesMember_019e89f7-34fe-78f8-af06-b18e9a345a9d" xlink:href="trc-20260630.xsd#trc_MineralResourcesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-34fe-7359-90be-76a6bfe96baf" xlink:to="loc_trc_MineralResourcesMember_019e89f7-34fe-78f8-af06-b18e9a345a9d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_FarmingAndAgricultureMember_019e89f7-34fe-729f-8184-5b3e33e7fdcf" xlink:href="trc-20260630.xsd#trc_FarmingAndAgricultureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-34fe-7359-90be-76a6bfe96baf" xlink:to="loc_trc_FarmingAndAgricultureMember_019e89f7-34fe-729f-8184-5b3e33e7fdcf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RanchOperationsMember_019e89f7-34fe-7076-bf11-11215c2cf9dd" xlink:href="trc-20260630.xsd#trc_RanchOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-34fe-7359-90be-76a6bfe96baf" xlink:to="loc_trc_RanchOperationsMember_019e89f7-34fe-7076-bf11-11215c2cf9dd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_ResortandResidentialRealEstateMember_019e89f7-34fe-7796-93a9-217621c2beaf" xlink:href="trc-20260630.xsd#trc_ResortandResidentialRealEstateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-34fe-7359-90be-76a6bfe96baf" xlink:to="loc_trc_ResortandResidentialRealEstateMember_019e89f7-34fe-7796-93a9-217621c2beaf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_019e89f7-34fe-7f8d-b18d-8a1d4d7824fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_RevenuesAbstract_019e89f7-34fe-7f8d-b18d-8a1d4d7824fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-34fe-7d6d-bffe-5e8e3f3c3b42" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019e89f7-34fe-7f8d-b18d-8a1d4d7824fd" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-34fe-7d6d-bffe-5e8e3f3c3b42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_019e89f7-34fe-7f53-8065-cd016583acb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_019e89f7-34fe-7f53-8065-cd016583acb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019e89f7-34fe-726c-9887-4669cc1174f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019e89f7-34fe-7f53-8065-cd016583acb4" xlink:to="loc_us-gaap_CostsAndExpenses_019e89f7-34fe-726c-9887-4669cc1174f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e89f7-34fe-7e93-9256-29b536f77383" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e89f7-34fe-7e93-9256-29b536f77383" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019e89f7-34fe-7e09-ae3d-6dbc403c3f4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019e89f7-34fe-7e09-ae3d-6dbc403c3f4c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeNet_019e89f7-34fe-7b30-81ec-fac80b74b4f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019e89f7-34fe-7e09-ae3d-6dbc403c3f4c" xlink:to="loc_us-gaap_InvestmentIncomeNet_019e89f7-34fe-7b30-81ec-fac80b74b4f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019e89f7-34fe-78f5-91b1-07c8360c2c64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019e89f7-34fe-7e09-ae3d-6dbc403c3f4c" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019e89f7-34fe-78f5-91b1-07c8360c2c64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019e89f7-34fe-7336-b08e-b0113567571f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019e89f7-34fe-7e09-ae3d-6dbc403c3f4c" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_019e89f7-34fe-7336-b08e-b0113567571f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e89f7-34fe-761c-a39e-e6d70476f242" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e89f7-34fe-761c-a39e-e6d70476f242" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e89f7-34fe-7b90-aec4-c74d77930013" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e89f7-34fe-7b90-aec4-c74d77930013" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e89f7-34fe-702b-9359-9d8b164415e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e89f7-34fe-702b-9359-9d8b164415e3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e89f7-34fe-75cf-92f7-2781ff6ba7ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e89f7-34fe-75cf-92f7-2781ff6ba7ad" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019e89f7-34fe-722e-a53d-f9e94c9ced34" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_ProfitLoss_019e89f7-34fe-722e-a53d-f9e94c9ced34" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019e89f7-34fe-70ab-a8e3-63dacacd828d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019e89f7-34fe-70ab-a8e3-63dacacd828d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e89f7-34fe-7637-b426-14b8cae2359c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_NetIncomeLoss_019e89f7-34fe-7637-b426-14b8cae2359c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019e89f7-34fe-7802-b6a4-1a12d33e33eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_EarningsPerShareBasic_019e89f7-34fe-7802-b6a4-1a12d33e33eb" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019e89f7-34fe-783f-83af-53c061a03e9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-71a7-9702-8d7ffae63695" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019e89f7-34fe-783f-83af-53c061a03e9a" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/UNAUDITEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" xlink:type="simple" xlink:href="trc-20260630.xsd#UNAUDITEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/UNAUDITEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e89f7-34fe-782a-b04e-c7a08db3cfc0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e89f7-34fe-7390-87fd-258c461de318" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-782a-b04e-c7a08db3cfc0" xlink:to="loc_us-gaap_StatementTable_019e89f7-34fe-7390-87fd-258c461de318" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019fa94c-3d0e-7e3b-8156-1dd06e5ef99a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e89f7-34fe-7390-87fd-258c461de318" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019fa94c-3d0e-7e3b-8156-1dd06e5ef99a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019fa94c-3d0e-7e3b-8156-1dd06e5ef99a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019fa94c-3d0e-7e3b-8156-1dd06e5ef99a" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019fa94c-3d0e-7e3b-8156-1dd06e5ef99a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019fa94c-3d0e-792e-9605-473a40d289c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019fa94c-3d0e-7e3b-8156-1dd06e5ef99a" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019fa94c-3d0e-792e-9605-473a40d289c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCDP1LLCMember_019fa94c-8409-7c60-92a0-041ea7a42f90" xlink:href="trc-20260630.xsd#trc_TRCDP1LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019fa94c-3d0e-792e-9605-473a40d289c3" xlink:to="loc_trc_TRCDP1LLCMember_019fa94c-8409-7c60-92a0-041ea7a42f90" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Land_019fa94d-ee5d-798f-b660-5b430efdf979" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Land"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-782a-b04e-c7a08db3cfc0" xlink:to="loc_us-gaap_Land_019fa94d-ee5d-798f-b660-5b430efdf979" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfOtherInvestments_019e89f7-34fe-71dc-ba09-cac9ece17893" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfOtherInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-782a-b04e-c7a08db3cfc0" xlink:to="loc_us-gaap_GainLossOnSaleOfOtherInvestments_019e89f7-34fe-71dc-ba09-cac9ece17893" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DeferredGainOnContributionOfLand_019fa959-63f6-7f4c-ba93-3a7db0bae33a" xlink:href="trc-20260630.xsd#trc_DeferredGainOnContributionOfLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-34fe-782a-b04e-c7a08db3cfc0" xlink:to="loc_trc_DeferredGainOnContributionOfLand_019fa959-63f6-7f4c-ba93-3a7db0bae33a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/UNAUDITEDCONSOLIDATEDSTATEMENTOFCHANGESINEQUITY" xlink:type="simple" xlink:href="trc-20260630.xsd#UNAUDITEDCONSOLIDATEDSTATEMENTOFCHANGESINEQUITY"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/UNAUDITEDCONSOLIDATEDSTATEMENTOFCHANGESINEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e89f7-35c0-7114-b1e5-2d7e2037fe60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e89f7-34fe-7f65-9574-0542d2cf3098" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-35c0-7114-b1e5-2d7e2037fe60" xlink:to="loc_us-gaap_StatementTable_019e89f7-34fe-7f65-9574-0542d2cf3098" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e89f7-34fe-7549-8c86-efb2a1bf1b13" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e89f7-34fe-7f65-9574-0542d2cf3098" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e89f7-34fe-7549-8c86-efb2a1bf1b13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e89f7-34fe-7549-8c86-efb2a1bf1b13_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e89f7-34fe-7549-8c86-efb2a1bf1b13" xlink:to="loc_us-gaap_EquityComponentDomain_019e89f7-34fe-7549-8c86-efb2a1bf1b13_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e89f7-34fe-73f2-8556-5294dbe4f444" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e89f7-34fe-7549-8c86-efb2a1bf1b13" xlink:to="loc_us-gaap_EquityComponentDomain_019e89f7-34fe-73f2-8556-5294dbe4f444" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_019e89f7-34fe-7b3b-bc09-4d3214a32ecf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e89f7-34fe-73f2-8556-5294dbe4f444" xlink:to="loc_us-gaap_ParentMember_019e89f7-34fe-7b3b-bc09-4d3214a32ecf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e89f7-34fe-7e33-b0af-949f07b22d2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f7-34fe-7b3b-bc09-4d3214a32ecf" xlink:to="loc_us-gaap_CommonStockMember_019e89f7-34fe-7e33-b0af-949f07b22d2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019e89f7-35c0-73d3-8371-7a6141e286d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f7-34fe-7b3b-bc09-4d3214a32ecf" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019e89f7-35c0-73d3-8371-7a6141e286d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e89f7-35c0-7747-bd85-465857da080d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f7-34fe-7b3b-bc09-4d3214a32ecf" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e89f7-35c0-7747-bd85-465857da080d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e89f7-35c0-7ca7-b466-ebefed930bf7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f7-34fe-7b3b-bc09-4d3214a32ecf" xlink:to="loc_us-gaap_RetainedEarningsMember_019e89f7-35c0-7ca7-b466-ebefed930bf7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019e89f7-35c0-796f-89eb-3487b78ba924" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e89f7-34fe-7b3b-bc09-4d3214a32ecf" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019e89f7-35c0-796f-89eb-3487b78ba924" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e89f7-35c0-7114-b1e5-2d7e2037fe60" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e89f7-35c0-7b14-af48-29a77f77763d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e89f7-35c0-7b14-af48-29a77f77763d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f7-35c0-73b7-a557-a7e33293ded7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f7-35c0-73b7-a557-a7e33293ded7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019e89f7-35c0-76ba-a4ef-1bdb326649ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:to="loc_us-gaap_ProfitLoss_019e89f7-35c0-76ba-a4ef-1bdb326649ac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e89f7-35c0-7d01-bb46-4f679ca3ae82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e89f7-35c0-7d01-bb46-4f679ca3ae82" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_019e89f7-35c0-7b83-b249-d6ab63b46c97" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_019e89f7-35c0-7b83-b249-d6ab63b46c97" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_019e89f7-35c0-762b-a0a9-06a8cdec3836" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross_019e89f7-35c0-762b-a0a9-06a8cdec3836" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e89f7-35c0-7faa-83c7-6c032e5ed8e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e89f7-35c0-7faa-83c7-6c032e5ed8e0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019e89f7-35c0-7b6f-95e9-bf4a99c910f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019e89f7-35c0-7b6f-95e9-bf4a99c910f1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019e89f7-35c0-7c38-b391-432003e36eb8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e89f7-35c0-7129-bdff-3ed94858017a" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019e89f7-35c0-7c38-b391-432003e36eb8" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e89f7-35c0-78fc-a428-5e1e908a755d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f7-35c0-7aa3-93a0-9beb8f6eee11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/MARKETABLESECURITIESScheduleofAvailableforsaleSecuritiesDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#MARKETABLESECURITIESScheduleofAvailableforsaleSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/MARKETABLESECURITIESScheduleofAvailableforsaleSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89f7-35c0-7f4e-b49d-ae6a37012aa9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89f7-35c0-74dd-979f-6912c20ada8f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89f7-35c0-7f4e-b49d-ae6a37012aa9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89f7-35c0-74dd-979f-6912c20ada8f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e89f7-35c0-72c8-8899-ffb967aa15d7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89f7-35c0-74dd-979f-6912c20ada8f" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e89f7-35c0-72c8-8899-ffb967aa15d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-72c8-8899-ffb967aa15d7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e89f7-35c0-72c8-8899-ffb967aa15d7" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-72c8-8899-ffb967aa15d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7ee3-899f-1128902fe211" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e89f7-35c0-72c8-8899-ffb967aa15d7" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7ee3-899f-1128902fe211" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_019e89f7-35c0-73a0-aeee-005f1db7c92c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7ee3-899f-1128902fe211" xlink:to="loc_us-gaap_CertificatesOfDepositMember_019e89f7-35c0-73a0-aeee-005f1db7c92c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentShorttermDebtSecuritiesMember_019e89f7-35c0-71e4-ad09-a2f16d386cb7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasuryAndGovernmentShorttermDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7ee3-899f-1128902fe211" xlink:to="loc_us-gaap_USTreasuryAndGovernmentShorttermDebtSecuritiesMember_019e89f7-35c0-71e4-ad09-a2f16d386cb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNoteSecuritiesMember_019e89f7-35c0-7e9d-9e8b-0128c864d108" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNoteSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7ee3-899f-1128902fe211" xlink:to="loc_us-gaap_CorporateNoteSecuritiesMember_019e89f7-35c0-7e9d-9e8b-0128c864d108" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_019e89f7-35c0-7df5-a93f-3cf0ddb4f393" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7ee3-899f-1128902fe211" xlink:to="loc_us-gaap_MunicipalBondsMember_019e89f7-35c0-7df5-a93f-3cf0ddb4f393" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e89f7-35c0-7e87-8658-3b8a2bc77832" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89f7-35c0-74dd-979f-6912c20ada8f" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e89f7-35c0-7e87-8658-3b8a2bc77832" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89f7-35c0-7e87-8658-3b8a2bc77832_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e89f7-35c0-7e87-8658-3b8a2bc77832" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89f7-35c0-7e87-8658-3b8a2bc77832_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89f7-35c0-7d6d-8f0c-c1d55fa52df7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e89f7-35c0-7e87-8658-3b8a2bc77832" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89f7-35c0-7d6d-8f0c-c1d55fa52df7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e89f7-35c0-7e7b-86ce-5f570b6090d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89f7-35c0-7d6d-8f0c-c1d55fa52df7" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e89f7-35c0-7e7b-86ce-5f570b6090d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e89f7-35c0-7261-8a5d-bdc485666ade" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e89f7-35c0-7d6d-8f0c-c1d55fa52df7" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e89f7-35c0-7261-8a5d-bdc485666ade" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019e89f7-35c0-7e1a-b74a-b32eb9f781e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89f7-35c0-74dd-979f-6912c20ada8f" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019e89f7-35c0-7e1a-b74a-b32eb9f781e1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e89f7-35c0-7e1a-b74a-b32eb9f781e1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e89f7-35c0-7e1a-b74a-b32eb9f781e1" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e89f7-35c0-7e1a-b74a-b32eb9f781e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e89f7-35c0-7e27-9ebc-1ffc20e5f666" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e89f7-35c0-7e1a-b74a-b32eb9f781e1" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e89f7-35c0-7e27-9ebc-1ffc20e5f666" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e89f7-35c0-7499-be11-d6a8b4b1c15f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e89f7-35c0-7e27-9ebc-1ffc20e5f666" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e89f7-35c0-7499-be11-d6a8b4b1c15f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e89f7-35c0-7b3e-8f42-fdb3138ebbba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e89f7-35c0-7499-be11-d6a8b4b1c15f" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e89f7-35c0-7b3e-8f42-fdb3138ebbba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019e89f7-35c0-75e1-a47c-42ef40bbfb05" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e89f7-35c0-7499-be11-d6a8b4b1c15f" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019e89f7-35c0-75e1-a47c-42ef40bbfb05" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e89f7-35c0-7b4d-aff8-78499a4175ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89f7-35c0-7f4e-b49d-ae6a37012aa9" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e89f7-35c0-7b4d-aff8-78499a4175ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019e89f7-35c0-7c26-8097-3f6ee5f033e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89f7-35c0-7f4e-b49d-ae6a37012aa9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019e89f7-35c0-7c26-8097-3f6ee5f033e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss_019e89f7-35c0-7e32-be59-56fc37c2f6a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89f7-35c0-7f4e-b49d-ae6a37012aa9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss_019e89f7-35c0-7e32-be59-56fc37c2f6a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019e89f7-35c0-7e8e-bac0-b3a35919d650" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89f7-35c0-7f4e-b49d-ae6a37012aa9" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019e89f7-35c0-7e8e-bac0-b3a35919d650" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/MARKETABLESECURITIESScheduleofAvailableforsaleSecuritiesbyMaturitiesDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#MARKETABLESECURITIESScheduleofAvailableforsaleSecuritiesbyMaturitiesDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/MARKETABLESECURITIESScheduleofAvailableforsaleSecuritiesbyMaturitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89f7-35c0-7519-9718-e1dafcb91097" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89f7-35c0-7f50-9ef7-40fa205eafb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89f7-35c0-7519-9718-e1dafcb91097" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89f7-35c0-7f50-9ef7-40fa205eafb5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e89f7-35c0-7414-b996-45bfff32f646" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e89f7-35c0-7f50-9ef7-40fa205eafb5" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e89f7-35c0-7414-b996-45bfff32f646" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7414-b996-45bfff32f646_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e89f7-35c0-7414-b996-45bfff32f646" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7414-b996-45bfff32f646_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7a47-b08a-3a149b135740" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e89f7-35c0-7414-b996-45bfff32f646" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7a47-b08a-3a149b135740" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_019e89f7-35c0-7439-b009-a5f0e3f8d83c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7a47-b08a-3a149b135740" xlink:to="loc_us-gaap_CertificatesOfDepositMember_019e89f7-35c0-7439-b009-a5f0e3f8d83c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentShorttermDebtSecuritiesMember_019e89f7-35c0-7953-8050-4a83db7074d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USTreasuryAndGovernmentShorttermDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7a47-b08a-3a149b135740" xlink:to="loc_us-gaap_USTreasuryAndGovernmentShorttermDebtSecuritiesMember_019e89f7-35c0-7953-8050-4a83db7074d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNoteSecuritiesMember_019e89f7-35c0-741a-b626-0e841aaf2e40" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNoteSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7a47-b08a-3a149b135740" xlink:to="loc_us-gaap_CorporateNoteSecuritiesMember_019e89f7-35c0-741a-b626-0e841aaf2e40" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_019e89f7-35c0-703b-bfca-3b7ee9d790f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e89f7-35c0-7a47-b08a-3a149b135740" xlink:to="loc_us-gaap_MunicipalBondsMember_019e89f7-35c0-703b-bfca-3b7ee9d790f4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_AvailableForSaleDebtSecuritiesFiscalYearMaturityAbstract_019e89f7-35c0-7a53-9eb8-157331a4db48" xlink:href="trc-20260630.xsd#trc_AvailableForSaleDebtSecuritiesFiscalYearMaturityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e89f7-35c0-7519-9718-e1dafcb91097" xlink:to="loc_trc_AvailableForSaleDebtSecuritiesFiscalYearMaturityAbstract_019e89f7-35c0-7a53-9eb8-157331a4db48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DebtSecuritiesAvailableForSaleSecuritiesExcludingAccruedInterestMaturitiesYearOneAtPar_019e89f7-35c0-7d83-a800-17abdcc41597" xlink:href="trc-20260630.xsd#trc_DebtSecuritiesAvailableForSaleSecuritiesExcludingAccruedInterestMaturitiesYearOneAtPar"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_AvailableForSaleDebtSecuritiesFiscalYearMaturityAbstract_019e89f7-35c0-7a53-9eb8-157331a4db48" xlink:to="loc_trc_DebtSecuritiesAvailableForSaleSecuritiesExcludingAccruedInterestMaturitiesYearOneAtPar_019e89f7-35c0-7d83-a800-17abdcc41597" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DebtSecuritiesAvailableForSaleSecuritiesExcludingAccruedInterestMaturitiesYearTwoAtPar_019e89f7-35c0-77fd-b32e-c14c5247a0f2" xlink:href="trc-20260630.xsd#trc_DebtSecuritiesAvailableForSaleSecuritiesExcludingAccruedInterestMaturitiesYearTwoAtPar"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_AvailableForSaleDebtSecuritiesFiscalYearMaturityAbstract_019e89f7-35c0-7a53-9eb8-157331a4db48" xlink:to="loc_trc_DebtSecuritiesAvailableForSaleSecuritiesExcludingAccruedInterestMaturitiesYearTwoAtPar_019e89f7-35c0-77fd-b32e-c14c5247a0f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DebtSecuritiesAvailableForSaleSecuritiesExcludingAccruedInterestMaturitiesAtPar_019e89f7-35c0-71bc-91c8-c6e2ec3782f4" xlink:href="trc-20260630.xsd#trc_DebtSecuritiesAvailableForSaleSecuritiesExcludingAccruedInterestMaturitiesAtPar"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_AvailableForSaleDebtSecuritiesFiscalYearMaturityAbstract_019e89f7-35c0-7a53-9eb8-157331a4db48" xlink:to="loc_trc_DebtSecuritiesAvailableForSaleSecuritiesExcludingAccruedInterestMaturitiesAtPar_019e89f7-35c0-71bc-91c8-c6e2ec3782f4" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/REALESTATEDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#REALESTATEDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/REALESTATEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89f7-35c0-71bb-8b02-6fcb80edb88f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e89f7-35c0-7414-9aa6-aa2462c91fe0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89f7-35c0-71bb-8b02-6fcb80edb88f" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e89f7-35c0-7414-9aa6-aa2462c91fe0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e89f7-35c0-7b64-9e72-19ebe75f2e84" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e89f7-35c0-7414-9aa6-aa2462c91fe0" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e89f7-35c0-7b64-9e72-19ebe75f2e84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e89f7-35c0-7b64-9e72-19ebe75f2e84_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e89f7-35c0-7b64-9e72-19ebe75f2e84" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e89f7-35c0-7b64-9e72-19ebe75f2e84_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e89f7-35c0-709c-b2c0-9fb0ca421781" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e89f7-35c0-7b64-9e72-19ebe75f2e84" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e89f7-35c0-709c-b2c0-9fb0ca421781" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TejonMountainVillageLlcMember_019e89f7-35c0-7de7-a560-fae15fe38ab9" xlink:href="trc-20260630.xsd#trc_TejonMountainVillageLlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e89f7-35c0-709c-b2c0-9fb0ca421781" xlink:to="loc_trc_TejonMountainVillageLlcMember_019e89f7-35c0-7de7-a560-fae15fe38ab9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_CentennialFoundersLlcMember_019e89f7-35c0-7472-8365-aacf358692da" xlink:href="trc-20260630.xsd#trc_CentennialFoundersLlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e89f7-35c0-709c-b2c0-9fb0ca421781" xlink:to="loc_trc_CentennialFoundersLlcMember_019e89f7-35c0-7472-8365-aacf358692da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_GrapevineMember_019e89f7-35c0-710d-8ce9-fd0ecfb9c22a" xlink:href="trc-20260630.xsd#trc_GrapevineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e89f7-35c0-709c-b2c0-9fb0ca421781" xlink:to="loc_trc_GrapevineMember_019e89f7-35c0-710d-8ce9-fd0ecfb9c22a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TejonRanchCommerceCenterCommercialMember_019e89f7-35c0-7248-8b8b-281b571e6e84" xlink:href="trc-20260630.xsd#trc_TejonRanchCommerceCenterCommercialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e89f7-35c0-709c-b2c0-9fb0ca421781" xlink:to="loc_trc_TejonRanchCommerceCenterCommercialMember_019e89f7-35c0-7248-8b8b-281b571e6e84" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TejonRanchCommerceCenterMultifamilyMember_019e89f7-35c0-737d-8a60-6a1692620d45" xlink:href="trc-20260630.xsd#trc_TejonRanchCommerceCenterMultifamilyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e89f7-35c0-709c-b2c0-9fb0ca421781" xlink:to="loc_trc_TejonRanchCommerceCenterMultifamilyMember_019e89f7-35c0-737d-8a60-6a1692620d45" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts_019e89f7-35c0-75ed-b8b8-7ed2db441691" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89f7-35c0-71bb-8b02-6fcb80edb88f" xlink:to="loc_us-gaap_InventoryRealEstateLandAndLandDevelopmentCosts_019e89f7-35c0-75ed-b8b8-7ed2db441691" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_InventoryRealEstateImprovementsGross_019e89f7-35c0-758d-95a0-af867bd95fb0" xlink:href="trc-20260630.xsd#trc_InventoryRealEstateImprovementsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89f7-35c0-71bb-8b02-6fcb80edb88f" xlink:to="loc_trc_InventoryRealEstateImprovementsGross_019e89f7-35c0-758d-95a0-af867bd95fb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_InventoryRealEstateImprovementsAccumulatedDepreciation_019e89f7-35c0-7f25-ba8b-ed69ff9bcfa3" xlink:href="trc-20260630.xsd#trc_InventoryRealEstateImprovementsAccumulatedDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89f7-35c0-71bb-8b02-6fcb80edb88f" xlink:to="loc_trc_InventoryRealEstateImprovementsAccumulatedDepreciation_019e89f7-35c0-7f25-ba8b-ed69ff9bcfa3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRealEstateImprovements_019e89f7-35c0-757a-b946-871826be6124" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryRealEstateImprovements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e89f7-35c0-71bb-8b02-6fcb80edb88f" xlink:to="loc_us-gaap_InventoryRealEstateImprovements_019e89f7-35c0-757a-b946-871826be6124" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/LONGTERMWATERASSETSAdditionalInformationDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#LONGTERMWATERASSETSAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/LONGTERMWATERASSETSAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_019e89f7-35c0-7797-b649-48277f5f84c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongLivedAssetsHeldForSaleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-7b65-97bc-fc45a17623a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_019e89f7-35c0-7797-b649-48277f5f84c5" xlink:to="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-7b65-97bc-fc45a17623a0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e89f7-35c0-797d-add1-17427433b776" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-7b65-97bc-fc45a17623a0" xlink:to="loc_srt_CounterpartyNameAxis_019e89f7-35c0-797d-add1-17427433b776" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-797d-add1-17427433b776_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-35c0-797d-add1-17427433b776" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-797d-add1-17427433b776_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7d7b-ad0c-23a0b6f73737" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-35c0-797d-add1-17427433b776" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7d7b-ad0c-23a0b6f73737" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_StateWaterProjectContractsMember_019e89f7-35c0-7291-8e65-35ebe9ab2336" xlink:href="trc-20260630.xsd#trc_StateWaterProjectContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7d7b-ad0c-23a0b6f73737" xlink:to="loc_trc_StateWaterProjectContractsMember_019e89f7-35c0-7291-8e65-35ebe9ab2336" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DMBPacificLLCMember_019e89f7-35c0-79d1-a4bb-34bb4df0d9f1" xlink:href="trc-20260630.xsd#trc_DMBPacificLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7d7b-ad0c-23a0b6f73737" xlink:to="loc_trc_DMBPacificLLCMember_019e89f7-35c0-79d1-a4bb-34bb4df0d9f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019e89f7-35c0-75da-8da9-46dba9b21780" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-7b65-97bc-fc45a17623a0" xlink:to="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019e89f7-35c0-75da-8da9-46dba9b21780" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-75da-8da9-46dba9b21780_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongLivedAssetsHeldForSaleNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019e89f7-35c0-75da-8da9-46dba9b21780" xlink:to="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-75da-8da9-46dba9b21780_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-7b90-ab6b-77316bdbb4cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongLivedAssetsHeldForSaleNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019e89f7-35c0-75da-8da9-46dba9b21780" xlink:to="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-7b90-ab6b-77316bdbb4cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TransferableWaterMember_019e89f7-35c0-71b7-8234-069b00150279" xlink:href="trc-20260630.xsd#trc_TransferableWaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-7b90-ab6b-77316bdbb4cb" xlink:to="loc_trc_TransferableWaterMember_019e89f7-35c0-71b7-8234-069b00150279" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e89f7-35c0-75a2-8493-dcdb5c7281d2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-7b65-97bc-fc45a17623a0" xlink:to="loc_srt_RangeAxis_019e89f7-35c0-75a2-8493-dcdb5c7281d2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89f7-35c0-75a2-8493-dcdb5c7281d2_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e89f7-35c0-75a2-8493-dcdb5c7281d2" xlink:to="loc_srt_RangeMember_019e89f7-35c0-75a2-8493-dcdb5c7281d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e89f7-35c0-7a2c-8685-b257e29535b5" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e89f7-35c0-75a2-8493-dcdb5c7281d2" xlink:to="loc_srt_RangeMember_019e89f7-35c0-7a2c-8685-b257e29535b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e89f7-35c0-76d7-ba45-440dc7387725" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e89f7-35c0-7a2c-8685-b257e29535b5" xlink:to="loc_srt_MaximumMember_019e89f7-35c0-76d7-ba45-440dc7387725" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongtermWaterAssetsWaterContractRightsforFutureDeliveryVolume_019e89f7-35c0-759e-bb02-4333461c6151" xlink:href="trc-20260630.xsd#trc_LongtermWaterAssetsWaterContractRightsforFutureDeliveryVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_019e89f7-35c0-7797-b649-48277f5f84c5" xlink:to="loc_trc_LongtermWaterAssetsWaterContractRightsforFutureDeliveryVolume_019e89f7-35c0-759e-bb02-4333461c6151" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongtermWaterAssetsVolume_019e89f7-35c0-7606-af64-bc8a99ded893" xlink:href="trc-20260630.xsd#trc_LongtermWaterAssetsVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_019e89f7-35c0-7797-b649-48277f5f84c5" xlink:to="loc_trc_LongtermWaterAssetsVolume_019e89f7-35c0-7606-af64-bc8a99ded893" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongTermWaterAssetsContractRenewalOptionalTerm_019e89f7-35c0-78d7-8d1b-f076eba6c02d" xlink:href="trc-20260630.xsd#trc_LongTermWaterAssetsContractRenewalOptionalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_019e89f7-35c0-7797-b649-48277f5f84c5" xlink:to="loc_trc_LongTermWaterAssetsContractRenewalOptionalTerm_019e89f7-35c0-78d7-8d1b-f076eba6c02d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_CostofPurchasedWaterArea_019e89f7-35c0-7d04-bb3c-b661879b5749" xlink:href="trc-20260630.xsd#trc_CostofPurchasedWaterArea"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_019e89f7-35c0-7797-b649-48277f5f84c5" xlink:to="loc_trc_CostofPurchasedWaterArea_019e89f7-35c0-7d04-bb3c-b661879b5749" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongTermWaterAssetsPurchasedAnnualFeeIncreasePercent_019e89f7-35c0-752d-8abc-5c85e8811c8c" xlink:href="trc-20260630.xsd#trc_LongTermWaterAssetsPurchasedAnnualFeeIncreasePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_019e89f7-35c0-7797-b649-48277f5f84c5" xlink:to="loc_trc_LongTermWaterAssetsPurchasedAnnualFeeIncreasePercent_019e89f7-35c0-752d-8abc-5c85e8811c8c" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/LONGTERMWATERASSETSScheduleofTangibleWaterAssetsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#LONGTERMWATERASSETSScheduleofTangibleWaterAssetsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/LONGTERMWATERASSETSScheduleofTangibleWaterAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_019e89f7-35c0-75fe-952a-1881bfabecaf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongLivedAssetsHeldForSaleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-7a18-8044-8e67f95e38bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_019e89f7-35c0-75fe-952a-1881bfabecaf" xlink:to="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-7a18-8044-8e67f95e38bc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019e89f7-35c0-7052-af4e-e45643c3926b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-7a18-8044-8e67f95e38bc" xlink:to="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019e89f7-35c0-7052-af4e-e45643c3926b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-7052-af4e-e45643c3926b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongLivedAssetsHeldForSaleNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019e89f7-35c0-7052-af4e-e45643c3926b" xlink:to="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-7052-af4e-e45643c3926b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-78a9-aee6-b8b0e122cc8f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongLivedAssetsHeldForSaleNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis_019e89f7-35c0-7052-af4e-e45643c3926b" xlink:to="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-78a9-aee6-b8b0e122cc8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_BankedWaterAndWaterForFutureDeliveryMember_019e89f7-35c0-7e11-91ab-1531a2eb543e" xlink:href="trc-20260630.xsd#trc_BankedWaterAndWaterForFutureDeliveryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-78a9-aee6-b8b0e122cc8f" xlink:to="loc_trc_BankedWaterAndWaterForFutureDeliveryMember_019e89f7-35c0-7e11-91ab-1531a2eb543e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TransferableWaterMember_019e89f7-35c0-7f79-ae1f-42e7badc62d2" xlink:href="trc-20260630.xsd#trc_TransferableWaterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleNameDomain_019e89f7-35c0-78a9-aee6-b8b0e122cc8f" xlink:to="loc_trc_TransferableWaterMember_019e89f7-35c0-7f79-ae1f-42e7badc62d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TangibleWaterAssetsBankedWaterandWaterContractRights_019e89f7-35c0-76c8-a48a-ba756397efb2" xlink:href="trc-20260630.xsd#trc_TangibleWaterAssetsBankedWaterandWaterContractRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongLivedAssetsHeldForSaleLineItems_019e89f7-35c0-75fe-952a-1881bfabecaf" xlink:to="loc_trc_TangibleWaterAssetsBankedWaterandWaterContractRights_019e89f7-35c0-76c8-a48a-ba756397efb2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/LONGTERMWATERASSETSScheduleofFiniteLivedIntangibleAssetsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#LONGTERMWATERASSETSScheduleofFiniteLivedIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/LONGTERMWATERASSETSScheduleofFiniteLivedIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89f7-35c0-79d2-b217-eba802105550" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e89f7-35c0-789b-b0e6-c924b0b56790" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89f7-35c0-79d2-b217-eba802105550" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e89f7-35c0-789b-b0e6-c924b0b56790" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89f7-35c0-7564-83af-c50f55a7c069" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e89f7-35c0-789b-b0e6-c924b0b56790" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89f7-35c0-7564-83af-c50f55a7c069" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89f7-35c0-7564-83af-c50f55a7c069_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89f7-35c0-7564-83af-c50f55a7c069" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89f7-35c0-7564-83af-c50f55a7c069_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89f7-35c0-74e7-8908-8a6a86286b1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e89f7-35c0-7564-83af-c50f55a7c069" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89f7-35c0-74e7-8908-8a6a86286b1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractBasedIntangibleAssetsMember_019e89f7-35c0-7f85-9306-d66cbdd51034" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractBasedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e89f7-35c0-74e7-8908-8a6a86286b1a" xlink:to="loc_us-gaap_ContractBasedIntangibleAssetsMember_019e89f7-35c0-7f85-9306-d66cbdd51034" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e89f7-35c0-7abc-a7c0-645f22be41c9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e89f7-35c0-789b-b0e6-c924b0b56790" xlink:to="loc_srt_CounterpartyNameAxis_019e89f7-35c0-7abc-a7c0-645f22be41c9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7abc-a7c0-645f22be41c9_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-35c0-7abc-a7c0-645f22be41c9" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7abc-a7c0-645f22be41c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7d1a-812f-3846c0c1424d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-35c0-7abc-a7c0-645f22be41c9" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7d1a-812f-3846c0c1424d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DudleyRidgeWaterRightsMember_019e89f7-35c0-730d-aad9-3ad7610d4b95" xlink:href="trc-20260630.xsd#trc_DudleyRidgeWaterRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7d1a-812f-3846c0c1424d" xlink:to="loc_trc_DudleyRidgeWaterRightsMember_019e89f7-35c0-730d-aad9-3ad7610d4b95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_NickelWaterRightsMember_019e89f7-35c0-77ac-8290-956906c76049" xlink:href="trc-20260630.xsd#trc_NickelWaterRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7d1a-812f-3846c0c1424d" xlink:to="loc_trc_NickelWaterRightsMember_019e89f7-35c0-77ac-8290-956906c76049" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TulareLakeBasinWaterRightsMember_019e89f7-35c0-7204-8284-02ac5629687b" xlink:href="trc-20260630.xsd#trc_TulareLakeBasinWaterRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7d1a-812f-3846c0c1424d" xlink:to="loc_trc_TulareLakeBasinWaterRightsMember_019e89f7-35c0-7204-8284-02ac5629687b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019e89f7-35c0-7369-8d4e-ad2ec2df88b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89f7-35c0-79d2-b217-eba802105550" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019e89f7-35c0-7369-8d4e-ad2ec2df88b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e89f7-35c0-7940-b41b-ebc892e6d61a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89f7-35c0-79d2-b217-eba802105550" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e89f7-35c0-7940-b41b-ebc892e6d61a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e89f7-35c0-7a6c-abcf-c7013635193a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89f7-35c0-79d2-b217-eba802105550" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e89f7-35c0-7a6c-abcf-c7013635193a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TangibleWaterAssetsBankedWaterandWaterContractRights_019e89f7-35c0-7853-88be-1ec57b660d68" xlink:href="trc-20260630.xsd#trc_TangibleWaterAssetsBankedWaterandWaterContractRights"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89f7-35c0-79d2-b217-eba802105550" xlink:to="loc_trc_TangibleWaterAssetsBankedWaterandWaterContractRights_019e89f7-35c0-7853-88be-1ec57b660d68" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongTermAssetsHeldForFutureUseOrSale_019e89f7-35c0-7eaf-a88c-82f201e36aec" xlink:href="trc-20260630.xsd#trc_LongTermAssetsHeldForFutureUseOrSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e89f7-35c0-79d2-b217-eba802105550" xlink:to="loc_trc_LongTermAssetsHeldForFutureUseOrSale_019e89f7-35c0-7eaf-a88c-82f201e36aec" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/LONGTERMWATERASSETSScheduleofComponentsofWaterAssetsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#LONGTERMWATERASSETSScheduleofComponentsofWaterAssetsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/LONGTERMWATERASSETSScheduleofComponentsofWaterAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongTermWaterAssetsLineItems_019e89f7-35c0-7dcd-8660-7ce4f0964108" xlink:href="trc-20260630.xsd#trc_LongTermWaterAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-77c4-8680-5acb446ca506" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_trc_LongTermWaterAssetsLineItems_019e89f7-35c0-7dcd-8660-7ce4f0964108" xlink:to="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-77c4-8680-5acb446ca506" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e89f7-35c0-71c8-b030-7dba50872948" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfLongLivedAssetsHeldForSaleTable_019e89f7-35c0-77c4-8680-5acb446ca506" xlink:to="loc_srt_CounterpartyNameAxis_019e89f7-35c0-71c8-b030-7dba50872948" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-71c8-b030-7dba50872948_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-35c0-71c8-b030-7dba50872948" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-71c8-b030-7dba50872948_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7580-929e-8cb960726211" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-35c0-71c8-b030-7dba50872948" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7580-929e-8cb960726211" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TejonCastacWaterDistrictMember_019e89f7-35c0-7830-a43e-cbe6846d935b" xlink:href="trc-20260630.xsd#trc_TejonCastacWaterDistrictMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7580-929e-8cb960726211" xlink:to="loc_trc_TejonCastacWaterDistrictMember_019e89f7-35c0-7830-a43e-cbe6846d935b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_AntelopeValleyEastKernWaterAgencyMember_019e89f7-35c0-738b-8396-00d3c75c7539" xlink:href="trc-20260630.xsd#trc_AntelopeValleyEastKernWaterAgencyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7580-929e-8cb960726211" xlink:to="loc_trc_AntelopeValleyEastKernWaterAgencyMember_019e89f7-35c0-738b-8396-00d3c75c7539" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DudleyRidgeNickelAndTulareWaterContractsMember_019e89f7-35c0-7123-acd6-cba743420752" xlink:href="trc-20260630.xsd#trc_DudleyRidgeNickelAndTulareWaterContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7580-929e-8cb960726211" xlink:to="loc_trc_DudleyRidgeNickelAndTulareWaterContractsMember_019e89f7-35c0-7123-acd6-cba743420752" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_WheelerRidgeMaricopaWaterStorageDistrictMember_019e89f7-35c0-76ad-8c2f-84f60700e2c2" xlink:href="trc-20260630.xsd#trc_WheelerRidgeMaricopaWaterStorageDistrictMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c0-7580-929e-8cb960726211" xlink:to="loc_trc_WheelerRidgeMaricopaWaterStorageDistrictMember_019e89f7-35c0-76ad-8c2f-84f60700e2c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongTermWaterAssetsBankedWaterAndWaterContractRightsAbstract_019e89f7-35c0-78f9-9bda-234eaf307210" xlink:href="trc-20260630.xsd#trc_LongTermWaterAssetsBankedWaterAndWaterContractRightsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_LongTermWaterAssetsLineItems_019e89f7-35c0-7dcd-8660-7ce4f0964108" xlink:to="loc_trc_LongTermWaterAssetsBankedWaterAndWaterContractRightsAbstract_019e89f7-35c0-78f9-9bda-234eaf307210" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongtermWaterAssetsBankedWaterandWaterContractRightsVolume_019e89f7-35c0-711c-8629-031740cf7716" xlink:href="trc-20260630.xsd#trc_LongtermWaterAssetsBankedWaterandWaterContractRightsVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_LongTermWaterAssetsBankedWaterAndWaterContractRightsAbstract_019e89f7-35c0-78f9-9bda-234eaf307210" xlink:to="loc_trc_LongtermWaterAssetsBankedWaterandWaterContractRightsVolume_019e89f7-35c0-711c-8629-031740cf7716" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongtermWaterAssetsBankedWaterHeldatCompanyOwnedWaterBankVolume_019e89f7-35c0-725e-81d1-fa6944a51a9f" xlink:href="trc-20260630.xsd#trc_LongtermWaterAssetsBankedWaterHeldatCompanyOwnedWaterBankVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_LongTermWaterAssetsBankedWaterAndWaterContractRightsAbstract_019e89f7-35c0-78f9-9bda-234eaf307210" xlink:to="loc_trc_LongtermWaterAssetsBankedWaterHeldatCompanyOwnedWaterBankVolume_019e89f7-35c0-725e-81d1-fa6944a51a9f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongtermWaterAssetsTransferrableWaterVolume_019e89f7-35c0-7b87-a69f-e74567b2b8dd" xlink:href="trc-20260630.xsd#trc_LongtermWaterAssetsTransferrableWaterVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_LongTermWaterAssetsBankedWaterAndWaterContractRightsAbstract_019e89f7-35c0-78f9-9bda-234eaf307210" xlink:to="loc_trc_LongtermWaterAssetsTransferrableWaterVolume_019e89f7-35c0-7b87-a69f-e74567b2b8dd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongTermWaterAssetsRechargedProjectWaterVolume_019e89f7-35c0-7996-822d-aa36c25962fd" xlink:href="trc-20260630.xsd#trc_LongTermWaterAssetsRechargedProjectWaterVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_LongTermWaterAssetsBankedWaterAndWaterContractRightsAbstract_019e89f7-35c0-78f9-9bda-234eaf307210" xlink:to="loc_trc_LongTermWaterAssetsRechargedProjectWaterVolume_019e89f7-35c0-7996-822d-aa36c25962fd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongtermWaterAssetsWaterContractsVolume_019e89f7-35c0-763c-a60d-cb174b5f3c3b" xlink:href="trc-20260630.xsd#trc_LongtermWaterAssetsWaterContractsVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_LongTermWaterAssetsLineItems_019e89f7-35c0-7dcd-8660-7ce4f0964108" xlink:to="loc_trc_LongtermWaterAssetsWaterContractsVolume_019e89f7-35c0-763c-a60d-cb174b5f3c3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongtermWaterAssetsIntangibleWaterContractsVolume_019e89f7-35c0-7265-b0b9-0f938fb6e35c" xlink:href="trc-20260630.xsd#trc_LongtermWaterAssetsIntangibleWaterContractsVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_LongTermWaterAssetsLineItems_019e89f7-35c0-7dcd-8660-7ce4f0964108" xlink:to="loc_trc_LongtermWaterAssetsIntangibleWaterContractsVolume_019e89f7-35c0-7265-b0b9-0f938fb6e35c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongTermWaterAssetsContractswithCompany_019e89f7-35c0-7fc8-abf0-a35d8a995fed" xlink:href="trc-20260630.xsd#trc_LongTermWaterAssetsContractswithCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_trc_LongTermWaterAssetsLineItems_019e89f7-35c0-7dcd-8660-7ce4f0964108" xlink:to="loc_trc_LongTermWaterAssetsContractswithCompany_019e89f7-35c0-7fc8-abf0-a35d8a995fed" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/LINEOFCREDITANDLONGTERMDEBTDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#LINEOFCREDITANDLONGTERMDEBTDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/LINEOFCREDITANDLONGTERMDEBTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_019e89f7-35c0-7a09-845b-dd0813d067e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_019e89f7-35c0-714a-88f2-f6960a1b01f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e89f7-35c0-7a09-845b-dd0813d067e8" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_019e89f7-35c0-714a-88f2-f6960a1b01f6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e89f7-35c0-756a-876b-a398412ef1d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e89f7-35c0-714a-88f2-f6960a1b01f6" xlink:to="loc_us-gaap_CreditFacilityAxis_019e89f7-35c0-756a-876b-a398412ef1d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e89f7-35c0-756a-876b-a398412ef1d8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e89f7-35c0-756a-876b-a398412ef1d8" xlink:to="loc_us-gaap_CreditFacilityDomain_019e89f7-35c0-756a-876b-a398412ef1d8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e89f7-35c0-72a8-9be5-1bf25536e343" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e89f7-35c0-756a-876b-a398412ef1d8" xlink:to="loc_us-gaap_CreditFacilityDomain_019e89f7-35c0-72a8-9be5-1bf25536e343" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019e89f7-35c0-70e0-a625-a4f80d84e105" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e89f7-35c0-72a8-9be5-1bf25536e343" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019e89f7-35c0-70e0-a625-a4f80d84e105" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e89f7-35c0-7c1e-94e1-c752988a3751" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e89f7-35c0-714a-88f2-f6960a1b01f6" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e89f7-35c0-7c1e-94e1-c752988a3751" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e89f7-35c0-7c1e-94e1-c752988a3751_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e89f7-35c0-7c1e-94e1-c752988a3751" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e89f7-35c0-7c1e-94e1-c752988a3751_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e89f7-35c0-7b6c-822f-69478dbc6aeb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e89f7-35c0-7c1e-94e1-c752988a3751" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e89f7-35c0-7b6c-822f-69478dbc6aeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RevolvingLineOfCreditMember_019e89f7-35c0-7370-a59b-908b08c0d428" xlink:href="trc-20260630.xsd#trc_RevolvingLineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e89f7-35c0-7b6c-822f-69478dbc6aeb" xlink:to="loc_trc_RevolvingLineOfCreditMember_019e89f7-35c0-7370-a59b-908b08c0d428" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019e89f7-35c0-719a-a152-586934d3cdb2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e89f7-35c0-7a09-845b-dd0813d067e8" xlink:to="loc_us-gaap_LineOfCredit_019e89f7-35c0-719a-a152-586934d3cdb2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e89f7-35c0-7483-93b5-f55af6583f77" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e89f7-35c0-7a09-845b-dd0813d067e8" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e89f7-35c0-7483-93b5-f55af6583f77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e89f7-35c0-79b4-8bc3-8a90b2cb65eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e89f7-35c0-7a09-845b-dd0813d067e8" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e89f7-35c0-79b4-8bc3-8a90b2cb65eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019e89f7-35c0-745b-b2a2-0de905d723f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e89f7-35c0-7a09-845b-dd0813d067e8" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019e89f7-35c0-745b-b2a2-0de905d723f0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DebtInstrumentPatronageRate_019e89f7-35c0-75ae-81dc-7906b4f5482c" xlink:href="trc-20260630.xsd#trc_DebtInstrumentPatronageRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e89f7-35c0-7a09-845b-dd0813d067e8" xlink:to="loc_trc_DebtInstrumentPatronageRate_019e89f7-35c0-75ae-81dc-7906b4f5482c" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/OTHERLIABILITIESDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#OTHERLIABILITIESDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/OTHERLIABILITIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c0-7460-a2ec-a154109ca6ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f7-35c0-79dc-b2da-4ce5a8f584eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c0-7460-a2ec-a154109ca6ab" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f7-35c0-79dc-b2da-4ce5a8f584eb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c0-71dd-89cb-7693607fc5b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f7-35c0-79dc-b2da-4ce5a8f584eb" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c0-71dd-89cb-7693607fc5b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c0-71dd-89cb-7693607fc5b4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c0-71dd-89cb-7693607fc5b4" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c0-71dd-89cb-7693607fc5b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c0-7669-b65b-cf264d356611" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c0-71dd-89cb-7693607fc5b4" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c0-7669-b65b-cf264d356611" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_019e89f7-35c0-7db0-a213-b95290c63cf7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c0-7669-b65b-cf264d356611" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_019e89f7-35c0-7db0-a213-b95290c63cf7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesAbstract_019e89f7-35c0-75ba-8704-32b3353ed78c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c0-7460-a2ec-a154109ca6ab" xlink:to="loc_us-gaap_OtherLiabilitiesAbstract_019e89f7-35c0-75ba-8704-32b3353ed78c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent_019e89f7-35c0-7576-891f-4bae44b6be02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesAbstract_019e89f7-35c0-75ba-8704-32b3353ed78c" xlink:to="loc_us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent_019e89f7-35c0-7576-891f-4bae44b6be02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSundryLiabilitiesNoncurrent_019e89f7-35c0-73a7-8aab-39db93a0b1b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherSundryLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesAbstract_019e89f7-35c0-75ba-8704-32b3353ed78c" xlink:to="loc_us-gaap_OtherSundryLiabilitiesNoncurrent_019e89f7-35c0-73a7-8aab-39db93a0b1b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019e89f7-35c0-7940-8f3f-ec6a8308a19e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesAbstract_019e89f7-35c0-75ba-8704-32b3353ed78c" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019e89f7-35c0-7940-8f3f-ec6a8308a19e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofStockGrantActivityDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofStockGrantActivityDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofStockGrantActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-7d49-93a1-8acaf4f778e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c1-7bae-b4fb-7584f1bcb9ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-7d49-93a1-8acaf4f778e6" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c1-7bae-b4fb-7584f1bcb9ca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e89f7-35c1-7102-a520-9ade56e3f184" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c1-7bae-b4fb-7584f1bcb9ca" xlink:to="loc_us-gaap_AwardTypeAxis_019e89f7-35c1-7102-a520-9ade56e3f184" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7102-a520-9ade56e3f184_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019e89f7-35c1-7102-a520-9ade56e3f184" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7102-a520-9ade56e3f184_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7785-ad8b-221424384707" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019e89f7-35c1-7102-a520-9ade56e3f184" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7785-ad8b-221424384707" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019e89f7-35c1-7bcf-a255-9a5c2a4d081c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7785-ad8b-221424384707" xlink:to="loc_us-gaap_PerformanceSharesMember_019e89f7-35c1-7bcf-a255-9a5c2a4d081c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e89f7-35c1-74cc-85a0-d6d3da941737" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-7d49-93a1-8acaf4f778e6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e89f7-35c1-74cc-85a0-d6d3da941737" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e89f7-35c1-761a-bbe7-c40f5adb6e80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e89f7-35c1-74cc-85a0-d6d3da941737" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e89f7-35c1-761a-bbe7-c40f5adb6e80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e89f7-35c1-7ed1-9245-b4fe101102f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e89f7-35c1-74cc-85a0-d6d3da941737" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e89f7-35c1-7ed1-9245-b4fe101102f0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019e89f7-35c1-7816-aef9-b68951284468" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e89f7-35c1-74cc-85a0-d6d3da941737" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019e89f7-35c1-7816-aef9-b68951284468" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019e89f7-35c1-7fb7-b6a3-95884f587228" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e89f7-35c1-74cc-85a0-d6d3da941737" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019e89f7-35c1-7fb7-b6a3-95884f587228" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e89f7-35c1-7ce3-b6ef-ae88933e1bac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSAdditionalInformationDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f9245-9dc4-7a4b-8d7d-65965de5a95c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f9245-9dc4-79ed-b48c-3d8455f9e782" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f9245-9dc4-7a4b-8d7d-65965de5a95c" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f9245-9dc4-79ed-b48c-3d8455f9e782" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019f9245-9dc4-74d8-9754-0ed9f63ce3f4" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f9245-9dc4-79ed-b48c-3d8455f9e782" xlink:to="loc_srt_RangeAxis_019f9245-9dc4-74d8-9754-0ed9f63ce3f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f9245-9dc4-74d8-9754-0ed9f63ce3f4_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019f9245-9dc4-74d8-9754-0ed9f63ce3f4" xlink:to="loc_srt_RangeMember_019f9245-9dc4-74d8-9754-0ed9f63ce3f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f9245-9dc4-743a-a083-17c5528c3146" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019f9245-9dc4-74d8-9754-0ed9f63ce3f4" xlink:to="loc_srt_RangeMember_019f9245-9dc4-743a-a083-17c5528c3146" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019f9245-9dc4-7e3d-8dd6-3832e8153f95" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f9245-9dc4-743a-a083-17c5528c3146" xlink:to="loc_srt_MinimumMember_019f9245-9dc4-7e3d-8dd6-3832e8153f95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019f9245-9dc4-7665-830d-c8f6051e8599" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f9245-9dc4-743a-a083-17c5528c3146" xlink:to="loc_srt_MaximumMember_019f9245-9dc4-7665-830d-c8f6051e8599" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019f9245-9dc4-724f-acdc-c94cf9ca2ae8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f9245-9dc4-79ed-b48c-3d8455f9e782" xlink:to="loc_us-gaap_AwardTypeAxis_019f9245-9dc4-724f-acdc-c94cf9ca2ae8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f9245-9dc4-724f-acdc-c94cf9ca2ae8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019f9245-9dc4-724f-acdc-c94cf9ca2ae8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f9245-9dc4-724f-acdc-c94cf9ca2ae8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f9245-9dc4-72e5-9c29-8de8285d05bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019f9245-9dc4-724f-acdc-c94cf9ca2ae8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f9245-9dc4-72e5-9c29-8de8285d05bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RelativeTotalShareholderReturnMember_019f9245-9dc4-78f6-ae9d-ac693f3e63ce" xlink:href="trc-20260630.xsd#trc_RelativeTotalShareholderReturnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f9245-9dc4-72e5-9c29-8de8285d05bc" xlink:to="loc_trc_RelativeTotalShareholderReturnMember_019f9245-9dc4-78f6-ae9d-ac693f3e63ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019fa6ae-6b83-7a8f-9521-eda07a03c4e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f9245-9dc4-72e5-9c29-8de8285d05bc" xlink:to="loc_us-gaap_RestrictedStockMember_019fa6ae-6b83-7a8f-9521-eda07a03c4e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019fa6b0-0733-7fa6-bb13-4e613dad856b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f9245-9dc4-72e5-9c29-8de8285d05bc" xlink:to="loc_us-gaap_PerformanceSharesMember_019fa6b0-0733-7fa6-bb13-4e613dad856b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019f9245-9dc4-72e6-a680-94496e7a2f5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f9245-9dc4-79ed-b48c-3d8455f9e782" xlink:to="loc_us-gaap_VestingAxis_019f9245-9dc4-72e6-a680-94496e7a2f5e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019f9245-9dc4-72e6-a680-94496e7a2f5e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_019f9245-9dc4-72e6-a680-94496e7a2f5e" xlink:to="loc_us-gaap_VestingDomain_019f9245-9dc4-72e6-a680-94496e7a2f5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019f9245-9dc4-77de-8172-bcdcab2a5d8b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_019f9245-9dc4-72e6-a680-94496e7a2f5e" xlink:to="loc_us-gaap_VestingDomain_019f9245-9dc4-77de-8172-bcdcab2a5d8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019f9245-9dc4-7a76-8a4f-3ff102b00a31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019f9245-9dc4-77de-8172-bcdcab2a5d8b" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019f9245-9dc4-7a76-8a4f-3ff102b00a31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019f9245-9dc4-73ed-9b28-2f440f17df3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019f9245-9dc4-77de-8172-bcdcab2a5d8b" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019f9245-9dc4-73ed-9b28-2f440f17df3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_019f9245-9dc4-7988-9fad-667f138e7963" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationAwardTrancheThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019f9245-9dc4-77de-8172-bcdcab2a5d8b" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_019f9245-9dc4-7988-9fad-667f138e7963" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019fa6ad-e850-7a1e-b529-df7ec424c71e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f9245-9dc4-7a4b-8d7d-65965de5a95c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019fa6ad-e850-7a1e-b529-df7ec424c71e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_PerformanceAwardsGrantedwithPerformanceConditionsNumberofSharestobeIssuedatTargetPerformance_019fa700-0b5b-7259-b2c8-0b2f05f88411" xlink:href="trc-20260630.xsd#trc_PerformanceAwardsGrantedwithPerformanceConditionsNumberofSharestobeIssuedatTargetPerformance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f9245-9dc4-7a4b-8d7d-65965de5a95c" xlink:to="loc_trc_PerformanceAwardsGrantedwithPerformanceConditionsNumberofSharestobeIssuedatTargetPerformance_019fa700-0b5b-7259-b2c8-0b2f05f88411" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019f9245-9dc4-7989-b858-a7b152478845" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f9245-9dc4-7a4b-8d7d-65965de5a95c" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019f9245-9dc4-7989-b858-a7b152478845" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_ShareBasedPaymentArrangementAwardsEarnedThresholdPercentage_019f9245-9dc4-7f4f-b6bc-9dc8c8c9b28f" xlink:href="trc-20260630.xsd#trc_ShareBasedPaymentArrangementAwardsEarnedThresholdPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f9245-9dc4-7a4b-8d7d-65965de5a95c" xlink:to="loc_trc_ShareBasedPaymentArrangementAwardsEarnedThresholdPercentage_019f9245-9dc4-7f4f-b6bc-9dc8c8c9b28f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019f9246-8d05-7661-b2a4-3218c8609023" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f9245-9dc4-7a4b-8d7d-65965de5a95c" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019f9246-8d05-7661-b2a4-3218c8609023" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019f9246-8d05-781c-bd72-57a3eac18940" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f9245-9dc4-7a4b-8d7d-65965de5a95c" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019f9246-8d05-781c-bd72-57a3eac18940" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofPerformanceShareGrantswithPerformanceConditionsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofPerformanceShareGrantswithPerformanceConditionsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofPerformanceShareGrantswithPerformanceConditionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-7a31-8028-2aff936eda5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c0-7477-987d-03187a24fb58" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-7a31-8028-2aff936eda5f" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c0-7477-987d-03187a24fb58" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e89f7-35c0-7e27-91c5-44f7f9cb03b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c0-7477-987d-03187a24fb58" xlink:to="loc_us-gaap_AwardTypeAxis_019e89f7-35c0-7e27-91c5-44f7f9cb03b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c0-7e27-91c5-44f7f9cb03b2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019e89f7-35c0-7e27-91c5-44f7f9cb03b2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c0-7e27-91c5-44f7f9cb03b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7b29-ba7a-0e5d2c3f817c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019e89f7-35c0-7e27-91c5-44f7f9cb03b2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7b29-ba7a-0e5d2c3f817c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019e89f7-35c1-7209-9391-5fcd75363a05" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7b29-ba7a-0e5d2c3f817c" xlink:to="loc_us-gaap_PerformanceSharesMember_019e89f7-35c1-7209-9391-5fcd75363a05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_PerformanceAwardsGrantedwithPerformanceConditionsMinimumNumberofSharestobeIssuedatThresholdPerformance_019fa558-78a6-78a4-ba91-54db3344941a" xlink:href="trc-20260630.xsd#trc_PerformanceAwardsGrantedwithPerformanceConditionsMinimumNumberofSharestobeIssuedatThresholdPerformance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-7a31-8028-2aff936eda5f" xlink:to="loc_trc_PerformanceAwardsGrantedwithPerformanceConditionsMinimumNumberofSharestobeIssuedatThresholdPerformance_019fa558-78a6-78a4-ba91-54db3344941a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_PerformanceAwardsGrantedwithPerformanceConditionsNumberofSharestobeIssuedatTargetPerformance_019e89f7-35c1-7bbc-982c-296ae914f55e" xlink:href="trc-20260630.xsd#trc_PerformanceAwardsGrantedwithPerformanceConditionsNumberofSharestobeIssuedatTargetPerformance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-7a31-8028-2aff936eda5f" xlink:to="loc_trc_PerformanceAwardsGrantedwithPerformanceConditionsNumberofSharestobeIssuedatTargetPerformance_019e89f7-35c1-7bbc-982c-296ae914f55e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_PerformanceAwardsGrantedwithPerformanceConditionsMaximumNumberofSharestobeIssuedatMaximumPerformance_019e89f7-35c1-70e3-a4a0-4425928f473e" xlink:href="trc-20260630.xsd#trc_PerformanceAwardsGrantedwithPerformanceConditionsMaximumNumberofSharestobeIssuedatMaximumPerformance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-7a31-8028-2aff936eda5f" xlink:to="loc_trc_PerformanceAwardsGrantedwithPerformanceConditionsMaximumNumberofSharestobeIssuedatMaximumPerformance_019e89f7-35c1-70e3-a4a0-4425928f473e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofAssumptionsUsedtoDetermineThePriceofMarketBasedPerformanceConditionGrantsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofAssumptionsUsedtoDetermineThePriceofMarketBasedPerformanceConditionGrantsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofAssumptionsUsedtoDetermineThePriceofMarketBasedPerformanceConditionGrantsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-71af-b05b-5cb354fd4b74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c1-75dc-b94a-ad0f55571490" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-71af-b05b-5cb354fd4b74" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c1-75dc-b94a-ad0f55571490" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e89f7-35c1-7c28-8c9e-63f770f94204" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c1-75dc-b94a-ad0f55571490" xlink:to="loc_us-gaap_AwardTypeAxis_019e89f7-35c1-7c28-8c9e-63f770f94204" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7c28-8c9e-63f770f94204_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019e89f7-35c1-7c28-8c9e-63f770f94204" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7c28-8c9e-63f770f94204_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7e28-8b31-b997e9ff9ad7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019e89f7-35c1-7c28-8c9e-63f770f94204" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7e28-8b31-b997e9ff9ad7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019e89f7-35c1-7dae-9074-150ab0bd42ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e89f7-35c1-7e28-8b31-b997e9ff9ad7" xlink:to="loc_us-gaap_PerformanceSharesMember_019e89f7-35c1-7dae-9074-150ab0bd42ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateAxis_019e89f7-35c1-7781-ac4c-805bc68f79a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c1-75dc-b94a-ad0f55571490" xlink:to="loc_us-gaap_AwardDateAxis_019e89f7-35c1-7781-ac4c-805bc68f79a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateDomain_019e89f7-35c1-7781-ac4c-805bc68f79a0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardDateAxis_019e89f7-35c1-7781-ac4c-805bc68f79a0" xlink:to="loc_us-gaap_AwardDateDomain_019e89f7-35c1-7781-ac4c-805bc68f79a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateDomain_019e89f7-35c1-7702-a39c-613660abac04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardDateAxis_019e89f7-35c1-7781-ac4c-805bc68f79a0" xlink:to="loc_us-gaap_AwardDateDomain_019e89f7-35c1-7702-a39c-613660abac04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_December162023Member_019e89f7-35c1-7ca2-b77c-248bd686edcc" xlink:href="trc-20260630.xsd#trc_December162023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_019e89f7-35c1-7702-a39c-613660abac04" xlink:to="loc_trc_December162023Member_019e89f7-35c1-7ca2-b77c-248bd686edcc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_March132024Member_019e89f7-35c1-7927-ba02-1802a0199fe3" xlink:href="trc-20260630.xsd#trc_March132024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_019e89f7-35c1-7702-a39c-613660abac04" xlink:to="loc_trc_March132024Member_019e89f7-35c1-7927-ba02-1802a0199fe3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_December112024Member_019e89f7-35c1-7e31-9ed6-51d90e7e889d" xlink:href="trc-20260630.xsd#trc_December112024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_019e89f7-35c1-7702-a39c-613660abac04" xlink:to="loc_trc_December112024Member_019e89f7-35c1-7e31-9ed6-51d90e7e889d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_March062025Member_019e89f7-35c1-737d-937c-72504e3f2191" xlink:href="trc-20260630.xsd#trc_March062025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_019e89f7-35c1-7702-a39c-613660abac04" xlink:to="loc_trc_March062025Member_019e89f7-35c1-737d-937c-72504e3f2191" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_June202025Member_019e89f7-35c1-7c91-a1c4-e6e3044d5f74" xlink:href="trc-20260630.xsd#trc_June202025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_019e89f7-35c1-7702-a39c-613660abac04" xlink:to="loc_trc_June202025Member_019e89f7-35c1-7c91-a1c4-e6e3044d5f74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_SharebasedCompensationArrangementbySharebasedPaymentAwardPriceatTargetAchievement_019e89f7-35c1-7159-a1b9-4d25e866441a" xlink:href="trc-20260630.xsd#trc_SharebasedCompensationArrangementbySharebasedPaymentAwardPriceatTargetAchievement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-71af-b05b-5cb354fd4b74" xlink:to="loc_trc_SharebasedCompensationArrangementbySharebasedPaymentAwardPriceatTargetAchievement_019e89f7-35c1-7159-a1b9-4d25e866441a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019e89f7-35c1-71a5-a14f-0875b0cb0a0c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-71af-b05b-5cb354fd4b74" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019e89f7-35c1-71a5-a14f-0875b0cb0a0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019e89f7-35c1-7de9-b3f9-d1290eb21fc8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-71af-b05b-5cb354fd4b74" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019e89f7-35c1-7de9-b3f9-d1290eb21fc8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardSimulatedPrice_019e89f7-35c1-7875-a85f-625d2becc2a5" xlink:href="trc-20260630.xsd#trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardSimulatedPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-71af-b05b-5cb354fd4b74" xlink:to="loc_trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardSimulatedPrice_019e89f7-35c1-7875-a85f-625d2becc2a5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e89f7-35c1-76ef-b602-6bb81b4ee9ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-71af-b05b-5cb354fd4b74" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e89f7-35c1-76ef-b602-6bb81b4ee9ce" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e89f7-35c1-745f-8f48-14edb78337ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-71af-b05b-5cb354fd4b74" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e89f7-35c1-745f-8f48-14edb78337ef" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofRelativeTotalShareholderReturnAwardsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofRelativeTotalShareholderReturnAwardsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofRelativeTotalShareholderReturnAwardsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f921f-8bc8-7999-8144-207cfc9ac0c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f921f-8bc8-7824-b4ab-d03b3cd3e105" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f921f-8bc8-7999-8144-207cfc9ac0c8" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f921f-8bc8-7824-b4ab-d03b3cd3e105" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateAxis_019f921f-8bc8-72d8-8e70-1b4549cffac1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f921f-8bc8-7824-b4ab-d03b3cd3e105" xlink:to="loc_us-gaap_AwardDateAxis_019f921f-8bc8-72d8-8e70-1b4549cffac1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateDomain_019f921f-8bc8-72d8-8e70-1b4549cffac1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardDateAxis_019f921f-8bc8-72d8-8e70-1b4549cffac1" xlink:to="loc_us-gaap_AwardDateDomain_019f921f-8bc8-72d8-8e70-1b4549cffac1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateDomain_019f921f-8bc8-708a-aab6-52887805b9d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardDateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardDateAxis_019f921f-8bc8-72d8-8e70-1b4549cffac1" xlink:to="loc_us-gaap_AwardDateDomain_019f921f-8bc8-708a-aab6-52887805b9d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_December092025Member_019f921f-8bc8-74bb-a370-735c6559ded8" xlink:href="trc-20260630.xsd#trc_December092025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_019f921f-8bc8-708a-aab6-52887805b9d4" xlink:to="loc_trc_December092025Member_019f921f-8bc8-74bb-a370-735c6559ded8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_March172026Member_019f921f-8bc8-7a7b-a3ad-0f0bb0f8c107" xlink:href="trc-20260630.xsd#trc_March172026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_019f921f-8bc8-708a-aab6-52887805b9d4" xlink:to="loc_trc_March172026Member_019f921f-8bc8-7a7b-a3ad-0f0bb0f8c107" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_April212026Member_019fa962-a081-7320-9e27-5f6a5d9a1588" xlink:href="trc-20260630.xsd#trc_April212026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_019f921f-8bc8-708a-aab6-52887805b9d4" xlink:to="loc_trc_April212026Member_019fa962-a081-7320-9e27-5f6a5d9a1588" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019f921f-8bc8-7aea-9b25-8291bf04393d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f921f-8bc8-7824-b4ab-d03b3cd3e105" xlink:to="loc_us-gaap_AwardTypeAxis_019f921f-8bc8-7aea-9b25-8291bf04393d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f921f-8bc8-7aea-9b25-8291bf04393d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019f921f-8bc8-7aea-9b25-8291bf04393d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f921f-8bc8-7aea-9b25-8291bf04393d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f921f-8bc8-7c49-80ec-6dc76acfeb45" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019f921f-8bc8-7aea-9b25-8291bf04393d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f921f-8bc8-7c49-80ec-6dc76acfeb45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RelativeTotalShareholderReturnMember_019f921f-8bc8-73fc-b79e-86621ce769b5" xlink:href="trc-20260630.xsd#trc_RelativeTotalShareholderReturnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f921f-8bc8-7c49-80ec-6dc76acfeb45" xlink:to="loc_trc_RelativeTotalShareholderReturnMember_019f921f-8bc8-73fc-b79e-86621ce769b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019f921f-8bc8-7f6e-94b1-6c11dbfdf0e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f921f-8bc8-7999-8144-207cfc9ac0c8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019f921f-8bc8-7f6e-94b1-6c11dbfdf0e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019f921f-8bc8-706a-a67d-9715f9667882" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f921f-8bc8-7999-8144-207cfc9ac0c8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019f921f-8bc8-706a-a67d-9715f9667882" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardSimulatedPrice_019f921f-8bc8-71ae-bd7e-b6a8cfdd99c6" xlink:href="trc-20260630.xsd#trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardSimulatedPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f921f-8bc8-7999-8144-207cfc9ac0c8" xlink:to="loc_trc_ShareBasedCompensationArrangementByShareBasedPaymentAwardSimulatedPrice_019f921f-8bc8-71ae-bd7e-b6a8cfdd99c6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019f921f-8bc8-73bd-9845-3b593f85ff81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f921f-8bc8-7999-8144-207cfc9ac0c8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019f921f-8bc8-73bd-9845-3b593f85ff81" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019f921f-8bc8-7c66-82b6-8b3997496b87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f921f-8bc8-7999-8144-207cfc9ac0c8" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019f921f-8bc8-7c66-82b6-8b3997496b87" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofStockCompensationCostsforEmployeeandNDSIPlansDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofStockCompensationCostsforEmployeeandNDSIPlansDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/STOCKCOMPENSATIONRESTRICTEDSTOCKANDPERFORMANCESHAREGRANTSScheduleofStockCompensationCostsforEmployeeandNDSIPlansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-754e-b2e0-4b8977997339" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c1-7c93-bbad-fb6177de3f4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-754e-b2e0-4b8977997339" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c1-7c93-bbad-fb6177de3f4e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019e89f7-35c1-7940-8abd-8f4170aa241b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e89f7-35c1-7c93-bbad-fb6177de3f4e" xlink:to="loc_us-gaap_PlanNameAxis_019e89f7-35c1-7940-8abd-8f4170aa241b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e89f7-35c1-7940-8abd-8f4170aa241b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019e89f7-35c1-7940-8abd-8f4170aa241b" xlink:to="loc_us-gaap_PlanNameDomain_019e89f7-35c1-7940-8abd-8f4170aa241b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e89f7-35c1-7f6b-9500-d1d51312ba63" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019e89f7-35c1-7940-8abd-8f4170aa241b" xlink:to="loc_us-gaap_PlanNameDomain_019e89f7-35c1-7f6b-9500-d1d51312ba63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_StockIncentivePlan1998Member_019e89f7-35c1-7bf2-bc04-a2d5dd1a1bf8" xlink:href="trc-20260630.xsd#trc_StockIncentivePlan1998Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e89f7-35c1-7f6b-9500-d1d51312ba63" xlink:to="loc_trc_StockIncentivePlan1998Member_019e89f7-35c1-7bf2-bc04-a2d5dd1a1bf8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_NonEmployeeDirectorStockIncentivePlanMember_019e89f7-35c1-7a9e-9a0e-9a96e6f3a518" xlink:href="trc-20260630.xsd#trc_NonEmployeeDirectorStockIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e89f7-35c1-7f6b-9500-d1d51312ba63" xlink:to="loc_trc_NonEmployeeDirectorStockIncentivePlanMember_019e89f7-35c1-7a9e-9a0e-9a96e6f3a518" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e89f7-35c1-7eed-85d0-0e74d0870739" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-754e-b2e0-4b8977997339" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e89f7-35c1-7eed-85d0-0e74d0870739" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_019e89f7-35c1-7992-a39b-fbb354f275c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-754e-b2e0-4b8977997339" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_019e89f7-35c1-7992-a39b-fbb354f275c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost_019e89f7-35c1-7c37-8146-bd5c660dab0a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e89f7-35c1-754e-b2e0-4b8977997339" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost_019e89f7-35c1-7c37-8146-bd5c660dab0a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#COMMITMENTSANDCONTINGENCIESAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/COMMITMENTSANDCONTINGENCIESAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_019e89f7-35c1-77d5-bd09-5bc17292f8f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_us-gaap_LossContingenciesTable_019e89f7-35c1-77d5-bd09-5bc17292f8f7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e89f7-35c1-76ab-bb00-57325eff85fe" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e89f7-35c1-77d5-bd09-5bc17292f8f7" xlink:to="loc_srt_CounterpartyNameAxis_019e89f7-35c1-76ab-bb00-57325eff85fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c1-76ab-bb00-57325eff85fe_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-35c1-76ab-bb00-57325eff85fe" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c1-76ab-bb00-57325eff85fe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c1-771a-beeb-a984ebc2c96b" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-35c1-76ab-bb00-57325eff85fe" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c1-771a-beeb-a984ebc2c96b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DMBPacificLLCMember_019e89f7-35c1-7df3-a3a5-9359f6a01647" xlink:href="trc-20260630.xsd#trc_DMBPacificLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c1-771a-beeb-a984ebc2c96b" xlink:to="loc_trc_DMBPacificLLCMember_019e89f7-35c1-7df3-a3a5-9359f6a01647" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e89f7-35c1-7df1-a5bf-f700b060bade" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e89f7-35c1-77d5-bd09-5bc17292f8f7" xlink:to="loc_us-gaap_CreditFacilityAxis_019e89f7-35c1-7df1-a5bf-f700b060bade" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e89f7-35c1-7df1-a5bf-f700b060bade_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e89f7-35c1-7df1-a5bf-f700b060bade" xlink:to="loc_us-gaap_CreditFacilityDomain_019e89f7-35c1-7df1-a5bf-f700b060bade_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e89f7-35c1-7581-9dea-a5675e1a5f35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e89f7-35c1-7df1-a5bf-f700b060bade" xlink:to="loc_us-gaap_CreditFacilityDomain_019e89f7-35c1-7581-9dea-a5675e1a5f35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_WestCommunityFacilitiesDistrictsMember_019e89f7-35c1-7fab-afc5-ea63bb6838cd" xlink:href="trc-20260630.xsd#trc_WestCommunityFacilitiesDistrictsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e89f7-35c1-7581-9dea-a5675e1a5f35" xlink:to="loc_trc_WestCommunityFacilitiesDistrictsMember_019e89f7-35c1-7fab-afc5-ea63bb6838cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_EastCommunityFacilitiesDistrictsMember_019e89f7-35c1-78b2-a94a-bd1ad69a7aa0" xlink:href="trc-20260630.xsd#trc_EastCommunityFacilitiesDistrictsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e89f7-35c1-7581-9dea-a5675e1a5f35" xlink:to="loc_trc_EastCommunityFacilitiesDistrictsMember_019e89f7-35c1-78b2-a94a-bd1ad69a7aa0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e89f7-35c1-796d-8ef0-a4ef571e139c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e89f7-35c1-77d5-bd09-5bc17292f8f7" xlink:to="loc_dei_LegalEntityAxis_019e89f7-35c1-796d-8ef0-a4ef571e139c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e89f7-35c1-796d-8ef0-a4ef571e139c_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e89f7-35c1-796d-8ef0-a4ef571e139c" xlink:to="loc_dei_EntityDomain_019e89f7-35c1-796d-8ef0-a4ef571e139c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e89f7-35c1-7033-baed-f01e34a20070" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e89f7-35c1-796d-8ef0-a4ef571e139c" xlink:to="loc_dei_EntityDomain_019e89f7-35c1-7033-baed-f01e34a20070" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRPFFAMember_019e89f7-35c1-7192-a66d-e5469b89803e" xlink:href="trc-20260630.xsd#trc_TRPFFAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e89f7-35c1-7033-baed-f01e34a20070" xlink:to="loc_trc_TRPFFAMember_019e89f7-35c1-7192-a66d-e5469b89803e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-74b7-b53e-4e4758a6b766" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e89f7-35c1-77d5-bd09-5bc17292f8f7" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-74b7-b53e-4e4758a6b766" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-74b7-b53e-4e4758a6b766_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-74b7-b53e-4e4758a6b766" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-74b7-b53e-4e4758a6b766_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-7dc4-ace3-e64a2c1c44c9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-74b7-b53e-4e4758a6b766" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-7dc4-ace3-e64a2c1c44c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCCEastMember_019e89f7-35c1-767f-b8ca-8d127c237b64" xlink:href="trc-20260630.xsd#trc_TRCCEastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-7dc4-ace3-e64a2c1c44c9" xlink:to="loc_trc_TRCCEastMember_019e89f7-35c1-767f-b8ca-8d127c237b64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019e89f7-35c1-7d9a-866e-8d9ea52b43b3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e89f7-35c1-77d5-bd09-5bc17292f8f7" xlink:to="loc_srt_StatementScenarioAxis_019e89f7-35c1-7d9a-866e-8d9ea52b43b3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019e89f7-35c1-7d9a-866e-8d9ea52b43b3_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019e89f7-35c1-7d9a-866e-8d9ea52b43b3" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019e89f7-35c1-7d9a-866e-8d9ea52b43b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019e89f7-35c1-7528-8a97-b125d5134052" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019e89f7-35c1-7d9a-866e-8d9ea52b43b3" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019e89f7-35c1-7528-8a97-b125d5134052" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_019e89f7-35c1-7d36-9241-48135a9dc536" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019e89f7-35c1-7528-8a97-b125d5134052" xlink:to="loc_srt_ScenarioForecastMember_019e89f7-35c1-7d36-9241-48135a9dc536" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_019e89f7-35c1-7ba0-8fa6-10af698dd622" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeasePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_us-gaap_OperatingLeasePayments_019e89f7-35c1-7ba0-8fa6-10af698dd622" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongTermWaterAssetsContractRenewalOptionalTerm_019e89f7-35c1-721d-b52c-1de78ea18aa5" xlink:href="trc-20260630.xsd#trc_LongTermWaterAssetsContractRenewalOptionalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_trc_LongTermWaterAssetsContractRenewalOptionalTerm_019e89f7-35c1-721d-b52c-1de78ea18aa5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractualObligation_019e89f7-35c1-73ac-9078-12e8f4739c90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractualObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_us-gaap_ContractualObligation_019e89f7-35c1-73ac-9078-12e8f4739c90" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_ContractTerminationIncentiveFeeCalculationMeasurementPeriodFromEntitlementAchievementDate_019e89f7-35c1-7c33-97ff-1c617f858fc8" xlink:href="trc-20260630.xsd#trc_ContractTerminationIncentiveFeeCalculationMeasurementPeriodFromEntitlementAchievementDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_trc_ContractTerminationIncentiveFeeCalculationMeasurementPeriodFromEntitlementAchievementDate_019e89f7-35c1-7c33-97ff-1c617f858fc8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_NumberofCommunityFacilityDistricts_019e89f7-35c1-71b5-9702-ac78560726e6" xlink:href="trc-20260630.xsd#trc_NumberofCommunityFacilityDistricts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_trc_NumberofCommunityFacilityDistricts_019e89f7-35c1-71b5-9702-ac78560726e6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_AcresOfLandRelatedToLandLiens_019e89f7-35c1-74c6-ba6e-1ae213a53879" xlink:href="trc-20260630.xsd#trc_AcresOfLandRelatedToLandLiens"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_trc_AcresOfLandRelatedToLandLiens_019e89f7-35c1-74c6-ba6e-1ae213a53879" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019e89f7-35c1-72c4-8f6a-1767ab390dcd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_us-gaap_LineOfCredit_019e89f7-35c1-72c4-8f6a-1767ab390dcd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019e89f7-35c1-7847-9e41-87212e48103f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019e89f7-35c1-7847-9e41-87212e48103f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_AdditionalReimbursementFunds_019e89f7-35c1-7c33-ab35-a3ee27138d9e" xlink:href="trc-20260630.xsd#trc_AdditionalReimbursementFunds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_trc_AdditionalReimbursementFunds_019e89f7-35c1-7c33-ab35-a3ee27138d9e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_ImprovementFundsReimbursementOfPublicInfrastructureCosts_019e89f7-35c1-75f9-8325-a6b583a4e4d8" xlink:href="trc-20260630.xsd#trc_ImprovementFundsReimbursementOfPublicInfrastructureCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_trc_ImprovementFundsReimbursementOfPublicInfrastructureCosts_019e89f7-35c1-75f9-8325-a6b583a4e4d8" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesOther_019e89f7-35c1-7705-9f11-a1fb7e4ff7d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e89f7-35c1-7f55-b90e-ddf5ffe117e7" xlink:to="loc_us-gaap_TaxesOther_019e89f7-35c1-7705-9f11-a1fb7e4ff7d1" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/COMMITMENTSANDCONTINGENCIESScheduleofWaterContractPaymentsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#COMMITMENTSANDCONTINGENCIESScheduleofWaterContractPaymentsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/COMMITMENTSANDCONTINGENCIESScheduleofWaterContractPaymentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_019f924f-ee93-7193-8ccf-520523437f0e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_019f924f-ee93-7265-9e39-7a32f5ed430a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f924f-ee93-7193-8ccf-520523437f0e" xlink:to="loc_us-gaap_OtherCommitmentsTable_019f924f-ee93-7265-9e39-7a32f5ed430a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsAxis_019f924f-ee93-7ea8-9b44-b83205ab377f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019f924f-ee93-7265-9e39-7a32f5ed430a" xlink:to="loc_us-gaap_OtherCommitmentsAxis_019f924f-ee93-7ea8-9b44-b83205ab377f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_019f924f-ee93-7ea8-9b44-b83205ab377f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_019f924f-ee93-7ea8-9b44-b83205ab377f" xlink:to="loc_us-gaap_OtherCommitmentsDomain_019f924f-ee93-7ea8-9b44-b83205ab377f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_019f924f-ee93-7d49-a76c-166416db0cde" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_019f924f-ee93-7ea8-9b44-b83205ab377f" xlink:to="loc_us-gaap_OtherCommitmentsDomain_019f924f-ee93-7d49-a76c-166416db0cde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_WRMWSDWaterContractMember_019f924f-ee93-786e-99ad-6b95d2eda50e" xlink:href="trc-20260630.xsd#trc_WRMWSDWaterContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_019f924f-ee93-7d49-a76c-166416db0cde" xlink:to="loc_trc_WRMWSDWaterContractMember_019f924f-ee93-786e-99ad-6b95d2eda50e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TCWDWaterContractMember_019f924f-ee93-7342-8b97-c218f1debb28" xlink:href="trc-20260630.xsd#trc_TCWDWaterContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_019f924f-ee93-7d49-a76c-166416db0cde" xlink:to="loc_trc_TCWDWaterContractMember_019f924f-ee93-7342-8b97-c218f1debb28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_NickelWaterContractMember_019f924f-ee93-7dbb-a935-c2c11dcd3698" xlink:href="trc-20260630.xsd#trc_NickelWaterContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_019f924f-ee93-7d49-a76c-166416db0cde" xlink:to="loc_trc_NickelWaterContractMember_019f924f-ee93-7dbb-a935-c2c11dcd3698" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_019f924f-ee93-74b6-96bd-62d9bd25566e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeasePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f924f-ee93-7193-8ccf-520523437f0e" xlink:to="loc_us-gaap_OperatingLeasePayments_019f924f-ee93-74b6-96bd-62d9bd25566e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/RETIREMENTPLANSAdditionalInformationDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#RETIREMENTPLANSAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/RETIREMENTPLANSAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c1-7477-8572-e52b241ae9d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f7-35c1-76a7-ac89-319f2cdb40c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c1-7477-8572-e52b241ae9d8" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f7-35c1-76a7-ac89-319f2cdb40c8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c1-7126-b95c-d5efae957238" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f7-35c1-76a7-ac89-319f2cdb40c8" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c1-7126-b95c-d5efae957238" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-7126-b95c-d5efae957238_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c1-7126-b95c-d5efae957238" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-7126-b95c-d5efae957238_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-712e-bb1b-47a113f04b92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c1-7126-b95c-d5efae957238" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-712e-bb1b-47a113f04b92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_019e89f7-35c1-70a6-9f46-58ece35b769d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-712e-bb1b-47a113f04b92" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_019e89f7-35c1-70a6-9f46-58ece35b769d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_019e89f7-35c1-79ba-8b6a-9c1c9f7fcdb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f7-35c1-76a7-ac89-319f2cdb40c8" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_019e89f7-35c1-79ba-8b6a-9c1c9f7fcdb4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_019e89f7-35c1-79ba-8b6a-9c1c9f7fcdb4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_019e89f7-35c1-79ba-8b6a-9c1c9f7fcdb4" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_019e89f7-35c1-79ba-8b6a-9c1c9f7fcdb4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_019e89f7-35c1-7e05-88bc-6eb4abdd5c27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_019e89f7-35c1-79ba-8b6a-9c1c9f7fcdb4" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_019e89f7-35c1-7e05-88bc-6eb4abdd5c27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_019e89f7-35c1-79b9-b9bb-82d230b14ded" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanDebtSecurityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_019e89f7-35c1-7e05-88bc-6eb4abdd5c27" xlink:to="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_019e89f7-35c1-79b9-b9bb-82d230b14ded" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019e89f7-35c1-7c39-8fcb-52c535b31aec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_019e89f7-35c1-7e05-88bc-6eb4abdd5c27" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019e89f7-35c1-7c39-8fcb-52c535b31aec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DefinedBenefitPlanAverageServicePeriod_019e89f7-35c1-7c5d-9796-796435eedf02" xlink:href="trc-20260630.xsd#trc_DefinedBenefitPlanAverageServicePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c1-7477-8572-e52b241ae9d8" xlink:to="loc_trc_DefinedBenefitPlanAverageServicePeriod_019e89f7-35c1-7c5d-9796-796435eedf02" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstract_019e89f7-35c1-7e4d-b43f-8b81dfa7d045" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c1-7477-8572-e52b241ae9d8" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstract_019e89f7-35c1-7e4d-b43f-8b81dfa7d045" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_019e89f7-35c1-7c38-8f9a-13f5366946ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAssetsTargetAllocationsAbstract_019e89f7-35c1-7e4d-b43f-8b81dfa7d045" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_019e89f7-35c1-7c38-8f9a-13f5366946ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_019e89f7-35c1-741f-bdd5-730418aca698" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c1-7477-8572-e52b241ae9d8" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_019e89f7-35c1-741f-bdd5-730418aca698" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_019e89f7-35c1-7421-9e3f-5a2c1b93be5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_019e89f7-35c1-741f-bdd5-730418aca698" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_019e89f7-35c1-7421-9e3f-5a2c1b93be5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_019e89f7-35c1-7aa7-a5c4-197b429ad54d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_019e89f7-35c1-741f-bdd5-730418aca698" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_019e89f7-35c1-7aa7-a5c4-197b429ad54d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/RETIREMENTPLANSNetPeriodicPensionCostDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#RETIREMENTPLANSNetPeriodicPensionCostDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/RETIREMENTPLANSNetPeriodicPensionCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c1-721b-9a67-37fefb319be2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f7-35c1-7ee1-b51c-a182e47a6b3e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c1-721b-9a67-37fefb319be2" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f7-35c1-7ee1-b51c-a182e47a6b3e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c1-746c-a161-3344717ff5ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e89f7-35c1-7ee1-b51c-a182e47a6b3e" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c1-746c-a161-3344717ff5ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-746c-a161-3344717ff5ec_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c1-746c-a161-3344717ff5ec" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-746c-a161-3344717ff5ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-7c33-b14e-f960beeb5faa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e89f7-35c1-746c-a161-3344717ff5ec" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-7c33-b14e-f960beeb5faa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_019e89f7-35c1-77de-a267-181f3fca3367" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-7c33-b14e-f960beeb5faa" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_019e89f7-35c1-77de-a267-181f3fca3367" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_019e89f7-35c1-760f-b65a-e3c8f3242043" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e89f7-35c1-7c33-b14e-f960beeb5faa" xlink:to="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_019e89f7-35c1-760f-b65a-e3c8f3242043" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019e89f7-35c1-7f6d-9620-b345842ea3ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e89f7-35c1-721b-9a67-37fefb319be2" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019e89f7-35c1-7f6d-9620-b345842ea3ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_019e89f7-35c1-7a68-967c-e608135c3baa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019e89f7-35c1-7f6d-9620-b345842ea3ce" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_019e89f7-35c1-7a68-967c-e608135c3baa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e89f7-35c1-756a-be0a-55764d90e59d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019e89f7-35c1-7f6d-9620-b345842ea3ce" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e89f7-35c1-756a-be0a-55764d90e59d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019e89f7-35c1-73a5-8d39-bdf360b3325f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019e89f7-35c1-7f6d-9620-b345842ea3ce" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019e89f7-35c1-73a5-8d39-bdf360b3325f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e89f7-35c1-76d9-850e-643b88b45929" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019e89f7-35c1-7f6d-9620-b345842ea3ce" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e89f7-35c1-76d9-850e-643b88b45929" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONReconciliationofRevenuesSegmentProfitsLossesandNetIncomeLossDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#REPORTINGSEGMENTSANDRELATEDINFORMATIONReconciliationofRevenuesSegmentProfitsLossesandNetIncomeLossDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONReconciliationofRevenuesSegmentProfitsLossesandNetIncomeLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7a02-836b-33861355d42c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7ee4-a922-dcb60d6178d7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7a02-836b-33861355d42c" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7ee4-a922-dcb60d6178d7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7ae6-9eca-81d47bc82a48" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7ee4-a922-dcb60d6178d7" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7ae6-9eca-81d47bc82a48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7ae6-9eca-81d47bc82a48_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7ae6-9eca-81d47bc82a48" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7ae6-9eca-81d47bc82a48_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-758e-b333-cc642f9aaf09" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7ae6-9eca-81d47bc82a48" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-758e-b333-cc642f9aaf09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7ffb-b698-8fb511ad6b3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-758e-b333-cc642f9aaf09" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7ffb-b698-8fb511ad6b3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019e89f7-35c1-733c-bb0e-99c5d6d4a6af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-758e-b333-cc642f9aaf09" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019e89f7-35c1-733c-bb0e-99c5d6d4a6af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7499-9432-6be203b19fa1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7ee4-a922-dcb60d6178d7" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7499-9432-6be203b19fa1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7499-9432-6be203b19fa1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7499-9432-6be203b19fa1" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7499-9432-6be203b19fa1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-715e-be6c-2c2eaa27237d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7499-9432-6be203b19fa1" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-715e-be6c-2c2eaa27237d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_CommercialAndIndustrialMember_019e89f7-35c1-71c1-907a-ffdb4a805286" xlink:href="trc-20260630.xsd#trc_CommercialAndIndustrialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-715e-be6c-2c2eaa27237d" xlink:to="loc_trc_CommercialAndIndustrialMember_019e89f7-35c1-71c1-907a-ffdb4a805286" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_MultifamilySegmentMember_019e89f7-35c1-7619-ae07-4c70628812d6" xlink:href="trc-20260630.xsd#trc_MultifamilySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-715e-be6c-2c2eaa27237d" xlink:to="loc_trc_MultifamilySegmentMember_019e89f7-35c1-7619-ae07-4c70628812d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_MineralResourcesMember_019e89f7-35c1-7734-9882-cb6b28aba6b3" xlink:href="trc-20260630.xsd#trc_MineralResourcesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-715e-be6c-2c2eaa27237d" xlink:to="loc_trc_MineralResourcesMember_019e89f7-35c1-7734-9882-cb6b28aba6b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_FarmingAndAgricultureMember_019e89f7-35c1-7fdc-8880-041ea8aa0668" xlink:href="trc-20260630.xsd#trc_FarmingAndAgricultureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-715e-be6c-2c2eaa27237d" xlink:to="loc_trc_FarmingAndAgricultureMember_019e89f7-35c1-7fdc-8880-041ea8aa0668" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RanchOperationsMember_019e89f7-35c1-7ee2-9208-a2ce9a970a0d" xlink:href="trc-20260630.xsd#trc_RanchOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-715e-be6c-2c2eaa27237d" xlink:to="loc_trc_RanchOperationsMember_019e89f7-35c1-7ee2-9208-a2ce9a970a0d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_ResortandResidentialRealEstateMember_019e89f7-35c1-773a-bf4a-10dfbc022207" xlink:href="trc-20260630.xsd#trc_ResortandResidentialRealEstateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-715e-be6c-2c2eaa27237d" xlink:to="loc_trc_ResortandResidentialRealEstateMember_019e89f7-35c1-773a-bf4a-10dfbc022207" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationRevenueAbstract_019e89f7-35c1-786d-a60d-be79844202b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationRevenueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7a02-836b-33861355d42c" xlink:to="loc_us-gaap_SegmentReportingInformationRevenueAbstract_019e89f7-35c1-786d-a60d-be79844202b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-7bcd-b217-a5391b4a2a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationRevenueAbstract_019e89f7-35c1-786d-a60d-be79844202b5" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-7bcd-b217-a5391b4a2a4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationIncomeLossBeforeIncomeTaxesAbstract_019e89f7-35c1-7d3b-b3bb-2ad9cb839e31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationIncomeLossBeforeIncomeTaxesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7a02-836b-33861355d42c" xlink:to="loc_us-gaap_SegmentReportingInformationIncomeLossBeforeIncomeTaxesAbstract_019e89f7-35c1-7d3b-b3bb-2ad9cb839e31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019e89f7-35c1-74c7-b769-243393f0069a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationIncomeLossBeforeIncomeTaxesAbstract_019e89f7-35c1-7d3b-b3bb-2ad9cb839e31" xlink:to="loc_us-gaap_GrossProfit_019e89f7-35c1-74c7-b769-243393f0069a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e89f7-35c1-7cf9-8eb8-2810f204f852" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7a02-836b-33861355d42c" xlink:to="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e89f7-35c1-7cf9-8eb8-2810f204f852" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeNet_019e89f7-35c1-73d6-abfe-290076bed2a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e89f7-35c1-7cf9-8eb8-2810f204f852" xlink:to="loc_us-gaap_InvestmentIncomeNet_019e89f7-35c1-73d6-abfe-290076bed2a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019fcc6f-2c85-78b0-b8fd-78475c4dd5fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e89f7-35c1-7cf9-8eb8-2810f204f852" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019fcc6f-2c85-78b0-b8fd-78475c4dd5fd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019e89f7-35c1-7bdd-b503-b5e380ddd521" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e89f7-35c1-7cf9-8eb8-2810f204f852" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019e89f7-35c1-7bdd-b503-b5e380ddd521" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019e89f7-35c1-7a32-80aa-4e79d9be63cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e89f7-35c1-7cf9-8eb8-2810f204f852" xlink:to="loc_us-gaap_CostsAndExpenses_019e89f7-35c1-7a32-80aa-4e79d9be63cb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e89f7-35c1-7fd2-bfd1-19fdb232df1e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_019e89f7-35c1-7cf9-8eb8-2810f204f852" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e89f7-35c1-7fd2-bfd1-19fdb232df1e" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofRealEstateSegmentsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofRealEstateSegmentsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofRealEstateSegmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7ea8-8939-fc7748d79cac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7ea8-8939-fc7748d79cac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7d75-851c-22bdfac44e10" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7ea8-8939-fc7748d79cac" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7d75-851c-22bdfac44e10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7d75-851c-22bdfac44e10_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7d75-851c-22bdfac44e10" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7d75-851c-22bdfac44e10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7f88-be75-23b34264422d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7d75-851c-22bdfac44e10" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7f88-be75-23b34264422d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_CommercialAndIndustrialMember_019e89f7-35c1-729f-ad7d-f0c5b31ea236" xlink:href="trc-20260630.xsd#trc_CommercialAndIndustrialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-7f88-be75-23b34264422d" xlink:to="loc_trc_CommercialAndIndustrialMember_019e89f7-35c1-729f-ad7d-f0c5b31ea236" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-77f3-92e2-20534e0fcea2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7ea8-8939-fc7748d79cac" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-77f3-92e2-20534e0fcea2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77f3-92e2-20534e0fcea2_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-77f3-92e2-20534e0fcea2" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77f3-92e2-20534e0fcea2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7537-a32b-71e0bbff2434" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-77f3-92e2-20534e0fcea2" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7537-a32b-71e0bbff2434" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7166-a112-98532a4b97ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7537-a32b-71e0bbff2434" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7166-a112-98532a4b97ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-7f41-9048-6cd4aad996bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-7f41-9048-6cd4aad996bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e89f7-35c1-74cc-932f-23b13768fd76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e89f7-35c1-74cc-932f-23b13768fd76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RevenuesandIncomeLossfromEquityMethodInvestments_019e89f7-35c1-7fc4-9703-c54328532e88" xlink:href="trc-20260630.xsd#trc_RevenuesandIncomeLossfromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:to="loc_trc_RevenuesandIncomeLossfromEquityMethodInvestments_019e89f7-35c1-7fc4-9703-c54328532e88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019f3620-5203-7354-876c-2178dae39166" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:to="loc_us-gaap_CostOfRevenue_019f3620-5203-7354-876c-2178dae39166" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_019e89f7-35c1-7d5f-a465-f598e2c35e8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_019e89f7-35c1-7d5f-a465-f598e2c35e8e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-7293-a6eb-5975dcb6e3fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-7293-a6eb-5975dcb6e3fd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019e89f7-35c1-7e50-afb4-355094d0cd7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019e89f7-35c1-7e50-afb4-355094d0cd7b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019e89f7-35c1-7a10-94a5-e902cd1e6c87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:to="loc_us-gaap_CostsAndExpenses_019e89f7-35c1-7a10-94a5-e902cd1e6c87" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_OperatingIncomeLossIncludingEquityInEarningsOfUnconsolidatedJointVentures_019e89f7-35c1-725f-b65d-31a175d69500" xlink:href="trc-20260630.xsd#trc_OperatingIncomeLossIncludingEquityInEarningsOfUnconsolidatedJointVentures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-79bf-b12f-1f851bf19a59" xlink:to="loc_trc_OperatingIncomeLossIncludingEquityInEarningsOfUnconsolidatedJointVentures_019e89f7-35c1-725f-b65d-31a175d69500" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONRevenueComponentsofNetOperatingIncomeLossfromthisSegmentDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#REPORTINGSEGMENTSANDRELATEDINFORMATIONRevenueComponentsofNetOperatingIncomeLossfromthisSegmentDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONRevenueComponentsofNetOperatingIncomeLossfromthisSegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7849-b078-696ecdce27c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-78ed-a8d6-8fb82eece080" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7849-b078-696ecdce27c3" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-78ed-a8d6-8fb82eece080" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7e07-b4bc-aa370351de49" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-78ed-a8d6-8fb82eece080" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7e07-b4bc-aa370351de49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7e07-b4bc-aa370351de49_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7e07-b4bc-aa370351de49" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7e07-b4bc-aa370351de49_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7340-bb63-70d0276e715d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7e07-b4bc-aa370351de49" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7340-bb63-70d0276e715d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7147-b038-e0c78e3ae5c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7340-bb63-70d0276e715d" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7147-b038-e0c78e3ae5c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7039-90b1-01dfa4f22c0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-78ed-a8d6-8fb82eece080" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7039-90b1-01dfa4f22c0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7039-90b1-01dfa4f22c0d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7039-90b1-01dfa4f22c0d" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7039-90b1-01dfa4f22c0d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7a1b-aeeb-f8f5c76a6dff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7039-90b1-01dfa4f22c0d" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7a1b-aeeb-f8f5c76a6dff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_MultifamilySegmentMember_019e89f7-35c1-71e8-907f-d6c0433a4ec7" xlink:href="trc-20260630.xsd#trc_MultifamilySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-7a1b-aeeb-f8f5c76a6dff" xlink:to="loc_trc_MultifamilySegmentMember_019e89f7-35c1-71e8-907f-d6c0433a4ec7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-7b0a-8605-346bce6b2ab2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7849-b078-696ecdce27c3" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-7b0a-8605-346bce6b2ab2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_019e89f7-35c1-7938-bbb9-96fcf9a7a58a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7849-b078-696ecdce27c3" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_019e89f7-35c1-7938-bbb9-96fcf9a7a58a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-7c44-9f28-16d68e0a0d6b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7849-b078-696ecdce27c3" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-7c44-9f28-16d68e0a0d6b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019fa6bd-10f2-765b-a047-6211bfdf51fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7849-b078-696ecdce27c3" xlink:to="loc_us-gaap_OperatingIncomeLoss_019fa6bd-10f2-765b-a047-6211bfdf51fd" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONRevenueComponentsofRealEsteResortResidentialDevelopmentSegmentsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#REPORTINGSEGMENTSANDRELATEDINFORMATIONRevenueComponentsofRealEsteResortResidentialDevelopmentSegmentsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONRevenueComponentsofRealEsteResortResidentialDevelopmentSegmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-77d0-bac1-7c649274edcb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7750-a433-ab31a2c2c82c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-77d0-bac1-7c649274edcb" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7750-a433-ab31a2c2c82c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7f33-bb56-1983d83e9204" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7750-a433-ab31a2c2c82c" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7f33-bb56-1983d83e9204" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7f33-bb56-1983d83e9204_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7f33-bb56-1983d83e9204" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7f33-bb56-1983d83e9204_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-797d-bc83-bdf4e441b782" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7f33-bb56-1983d83e9204" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-797d-bc83-bdf4e441b782" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7208-9adc-2035b3c8c384" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-797d-bc83-bdf4e441b782" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7208-9adc-2035b3c8c384" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7179-ab85-0842537883ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7750-a433-ab31a2c2c82c" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7179-ab85-0842537883ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7179-ab85-0842537883ea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7179-ab85-0842537883ea" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7179-ab85-0842537883ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-765e-97b2-eed60d8dfd8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7179-ab85-0842537883ea" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-765e-97b2-eed60d8dfd8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_ResortandResidentialRealEstateMember_019e89f7-35c1-7414-b44b-6d62ae79242e" xlink:href="trc-20260630.xsd#trc_ResortandResidentialRealEstateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-765e-97b2-eed60d8dfd8e" xlink:to="loc_trc_ResortandResidentialRealEstateMember_019e89f7-35c1-7414-b44b-6d62ae79242e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019e89f7-35c1-7430-95c4-2c44d6644445" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-77d0-bac1-7c649274edcb" xlink:to="loc_us-gaap_OperatingExpenses_019e89f7-35c1-7430-95c4-2c44d6644445" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-7519-825d-86232b6efec0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-77d0-bac1-7c649274edcb" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-7519-825d-86232b6efec0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_019e89f7-35c1-78a0-83a5-aebbf33851ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-77d0-bac1-7c649274edcb" xlink:to="loc_us-gaap_Depreciation_019e89f7-35c1-78a0-83a5-aebbf33851ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019e89f7-35c1-7af2-a46e-2535a7eb5554" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-77d0-bac1-7c649274edcb" xlink:to="loc_us-gaap_CostsAndExpenses_019e89f7-35c1-7af2-a46e-2535a7eb5554" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e89f7-35c1-78a3-89a7-92dfddef3191" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-77d0-bac1-7c649274edcb" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e89f7-35c1-78a3-89a7-92dfddef3191" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofMineralResourcesSegmentDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofMineralResourcesSegmentDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofMineralResourcesSegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7e7a-9126-d739f66fd031" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7300-8c46-c3fbef5ca474" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7e7a-9126-d739f66fd031" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7300-8c46-c3fbef5ca474" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7996-be25-60889edbac13" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7300-8c46-c3fbef5ca474" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7996-be25-60889edbac13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7996-be25-60889edbac13_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7996-be25-60889edbac13" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7996-be25-60889edbac13_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-71a9-a719-a29e30036a1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7996-be25-60889edbac13" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-71a9-a719-a29e30036a1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_MineralResourcesMember_019e89f7-35c1-74a3-8735-83a20fc9e181" xlink:href="trc-20260630.xsd#trc_MineralResourcesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-71a9-a719-a29e30036a1a" xlink:to="loc_trc_MineralResourcesMember_019e89f7-35c1-74a3-8735-83a20fc9e181" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7514-9c59-792e380178e4" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7300-8c46-c3fbef5ca474" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7514-9c59-792e380178e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7514-9c59-792e380178e4_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7514-9c59-792e380178e4" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7514-9c59-792e380178e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-758a-ad6a-5ee7b0616b84" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-7514-9c59-792e380178e4" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-758a-ad6a-5ee7b0616b84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7555-bfdc-bd73dddcbae8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-758a-ad6a-5ee7b0616b84" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7555-bfdc-bd73dddcbae8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-7b5c-bf27-60fd7039dbc9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7e7a-9126-d739f66fd031" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-7b5c-bf27-60fd7039dbc9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfPurchasedWater_019e89f7-35c1-7ad0-93aa-17eb79656a17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfPurchasedWater"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7e7a-9126-d739f66fd031" xlink:to="loc_us-gaap_CostOfPurchasedWater_019e89f7-35c1-7ad0-93aa-17eb79656a17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019e89f7-35c1-7769-835b-48ab75cabc83" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7e7a-9126-d739f66fd031" xlink:to="loc_us-gaap_OperatingExpenses_019e89f7-35c1-7769-835b-48ab75cabc83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-7be1-983e-d76c4266a409" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7e7a-9126-d739f66fd031" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-7be1-983e-d76c4266a409" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019e89f7-35c1-7b78-b8e1-7557f13ca0a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7e7a-9126-d739f66fd031" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019e89f7-35c1-7b78-b8e1-7557f13ca0a3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019e89f7-35c1-7d4b-b694-8896803a58d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7e7a-9126-d739f66fd031" xlink:to="loc_us-gaap_CostsAndExpenses_019e89f7-35c1-7d4b-b694-8896803a58d1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e89f7-35c1-74c2-852e-a991c2906a1d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7e7a-9126-d739f66fd031" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e89f7-35c1-74c2-852e-a991c2906a1d" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofFarmingSegmentsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofFarmingSegmentsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofFarmingSegmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7d21-b829-a4b34b155e98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7152-ae81-d18944a4b506" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7d21-b829-a4b34b155e98" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7152-ae81-d18944a4b506" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7737-9a12-36de8be32056" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7152-ae81-d18944a4b506" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7737-9a12-36de8be32056" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7737-9a12-36de8be32056_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7737-9a12-36de8be32056" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7737-9a12-36de8be32056_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7690-81d1-fb2c8b52e92d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7737-9a12-36de8be32056" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7690-81d1-fb2c8b52e92d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_FarmingAndAgricultureMember_019e89f7-35c1-734b-9803-3b895769e190" xlink:href="trc-20260630.xsd#trc_FarmingAndAgricultureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-7690-81d1-fb2c8b52e92d" xlink:to="loc_trc_FarmingAndAgricultureMember_019e89f7-35c1-734b-9803-3b895769e190" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-786f-9e41-02ffc0dbeae8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7152-ae81-d18944a4b506" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-786f-9e41-02ffc0dbeae8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-786f-9e41-02ffc0dbeae8_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-786f-9e41-02ffc0dbeae8" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-786f-9e41-02ffc0dbeae8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7789-ae41-8b354aab71ae" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-786f-9e41-02ffc0dbeae8" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7789-ae41-8b354aab71ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-738d-8e2b-31f7e52b6720" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-7789-ae41-8b354aab71ae" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-738d-8e2b-31f7e52b6720" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-7998-8ed9-a80754337bac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7d21-b829-a4b34b155e98" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-7998-8ed9-a80754337bac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019e89f7-35c1-7456-aed8-09e19d8c244f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7d21-b829-a4b34b155e98" xlink:to="loc_us-gaap_CostOfRevenue_019e89f7-35c1-7456-aed8-09e19d8c244f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-71fd-aeab-b9fe2af17c28" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7d21-b829-a4b34b155e98" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-71fd-aeab-b9fe2af17c28" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019e89f7-35c1-7841-b975-2adeb695085b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7d21-b829-a4b34b155e98" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019e89f7-35c1-7841-b975-2adeb695085b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DirectOperatingCosts_019fd285-858d-7b7b-a977-5fdbc135a8b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DirectOperatingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7d21-b829-a4b34b155e98" xlink:to="loc_us-gaap_DirectOperatingCosts_019fd285-858d-7b7b-a977-5fdbc135a8b5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_OperatingResultsFromFarmingBeforeFixedWaterObligations_019f925c-400c-78b5-9d0b-ba70b357c790" xlink:href="trc-20260630.xsd#trc_OperatingResultsFromFarmingBeforeFixedWaterObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7d21-b829-a4b34b155e98" xlink:to="loc_trc_OperatingResultsFromFarmingBeforeFixedWaterObligations_019f925c-400c-78b5-9d0b-ba70b357c790" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_FixedWaterObligations_019e89f7-35c1-76ef-902e-31ae32333a2f" xlink:href="trc-20260630.xsd#trc_FixedWaterObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7d21-b829-a4b34b155e98" xlink:to="loc_trc_FixedWaterObligations_019e89f7-35c1-76ef-902e-31ae32333a2f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e89f7-35c1-752d-8275-0840a6f893c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-7d21-b829-a4b34b155e98" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e89f7-35c1-752d-8275-0840a6f893c7" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofRanchOperationsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofRanchOperationsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONScheduleofRevenueComponentsofRanchOperationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-775b-b819-f37eb5eb3524" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-72a8-88d1-2196c1854f85" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-775b-b819-f37eb5eb3524" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-72a8-88d1-2196c1854f85" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7daa-a927-a88e28172fe0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-72a8-88d1-2196c1854f85" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7daa-a927-a88e28172fe0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7daa-a927-a88e28172fe0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7daa-a927-a88e28172fe0" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7daa-a927-a88e28172fe0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-77c6-ae3a-982226d4ec1e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7daa-a927-a88e28172fe0" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-77c6-ae3a-982226d4ec1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RanchOperationsMember_019e89f7-35c1-7c6b-b334-5fdc55267301" xlink:href="trc-20260630.xsd#trc_RanchOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-77c6-ae3a-982226d4ec1e" xlink:to="loc_trc_RanchOperationsMember_019e89f7-35c1-7c6b-b334-5fdc55267301" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-789a-86ef-b7860fbebdf0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-72a8-88d1-2196c1854f85" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-789a-86ef-b7860fbebdf0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-789a-86ef-b7860fbebdf0_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-789a-86ef-b7860fbebdf0" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-789a-86ef-b7860fbebdf0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77b8-bf63-7a306b6ce909" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-789a-86ef-b7860fbebdf0" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77b8-bf63-7a306b6ce909" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7755-a83a-592aa91040ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77b8-bf63-7a306b6ce909" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7755-a83a-592aa91040ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-739b-9964-507d1fcf1192" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-775b-b819-f37eb5eb3524" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e89f7-35c1-739b-9964-507d1fcf1192" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_019e89f7-35c1-7014-966c-2960f9b5bcf4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-775b-b819-f37eb5eb3524" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_019e89f7-35c1-7014-966c-2960f9b5bcf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-74d4-8f8a-1f7bdc19c729" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-775b-b819-f37eb5eb3524" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e89f7-35c1-74d4-8f8a-1f7bdc19c729" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019e89f7-35c1-7bd2-b69d-aa093587cff8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-775b-b819-f37eb5eb3524" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019e89f7-35c1-7bd2-b69d-aa093587cff8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019e89f7-35c1-778e-af63-4730b3ff6a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-775b-b819-f37eb5eb3524" xlink:to="loc_us-gaap_CostsAndExpenses_019e89f7-35c1-778e-af63-4730b3ff6a4b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e89f7-35c1-702b-bfdf-ca55acdd892b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_019e89f7-35c1-775b-b819-f37eb5eb3524" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e89f7-35c1-702b-bfdf-ca55acdd892b" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONInformationPertainingtoIdentifiableAssetsDepreciationandAmortizationCapitalExpendituresofReportableSegmentsDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#REPORTINGSEGMENTSANDRELATEDINFORMATIONInformationPertainingtoIdentifiableAssetsDepreciationandAmortizationCapitalExpendituresofReportableSegmentsDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/REPORTINGSEGMENTSANDRELATEDINFORMATIONInformationPertainingtoIdentifiableAssetsDepreciationandAmortizationCapitalExpendituresofReportableSegmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e89f7-35c1-776f-9cf8-e7e2eed2396a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7050-9057-34b69f608ef2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f7-35c1-776f-9cf8-e7e2eed2396a" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7050-9057-34b69f608ef2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-77cc-b10b-99375ce4b71e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7050-9057-34b69f608ef2" xlink:to="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-77cc-b10b-99375ce4b71e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77cc-b10b-99375ce4b71e_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-77cc-b10b-99375ce4b71e" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77cc-b10b-99375ce4b71e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77ae-a159-a98248e6fdd9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e89f7-35c1-77cc-b10b-99375ce4b71e" xlink:to="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77ae-a159-a98248e6fdd9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7e53-8094-a275965d7dab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77ae-a159-a98248e6fdd9" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e89f7-35c1-7e53-8094-a275965d7dab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019e89f7-35c1-7068-9eee-a74ba47e9a54" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e89f7-35c1-77ae-a159-a98248e6fdd9" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019e89f7-35c1-7068-9eee-a74ba47e9a54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7797-a0af-dc317baa1673" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_019e89f7-35c1-7050-9057-34b69f608ef2" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7797-a0af-dc317baa1673" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7797-a0af-dc317baa1673_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7797-a0af-dc317baa1673" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7797-a0af-dc317baa1673_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e89f7-35c1-7e6e-8147-1ce86d6f815b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e89f7-35c1-7797-a0af-dc317baa1673" xlink:to="loc_us-gaap_SegmentDomain_019e89f7-35c1-7e6e-8147-1ce86d6f815b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_CommercialAndIndustrialMember_019e89f7-35c1-7ba0-a10a-a458f71cd32b" xlink:href="trc-20260630.xsd#trc_CommercialAndIndustrialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-7e6e-8147-1ce86d6f815b" xlink:to="loc_trc_CommercialAndIndustrialMember_019e89f7-35c1-7ba0-a10a-a458f71cd32b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_MultifamilySegmentMember_019e89f7-35c1-7b8c-baa7-6839c263a74c" xlink:href="trc-20260630.xsd#trc_MultifamilySegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-7e6e-8147-1ce86d6f815b" xlink:to="loc_trc_MultifamilySegmentMember_019e89f7-35c1-7b8c-baa7-6839c263a74c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_ResortandResidentialRealEstateMember_019e89f7-35c1-70ad-b7dc-305457c044f9" xlink:href="trc-20260630.xsd#trc_ResortandResidentialRealEstateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-7e6e-8147-1ce86d6f815b" xlink:to="loc_trc_ResortandResidentialRealEstateMember_019e89f7-35c1-70ad-b7dc-305457c044f9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_MineralResourcesMember_019e89f7-35c1-7228-8c70-2bc4afe7c947" xlink:href="trc-20260630.xsd#trc_MineralResourcesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-7e6e-8147-1ce86d6f815b" xlink:to="loc_trc_MineralResourcesMember_019e89f7-35c1-7228-8c70-2bc4afe7c947" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_FarmingAndAgricultureMember_019e89f7-35c1-7fd2-b181-b4bcc37e9a2b" xlink:href="trc-20260630.xsd#trc_FarmingAndAgricultureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-7e6e-8147-1ce86d6f815b" xlink:to="loc_trc_FarmingAndAgricultureMember_019e89f7-35c1-7fd2-b181-b4bcc37e9a2b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RanchOperationsMember_019e89f7-35c1-704c-bfff-ec04093aabbc" xlink:href="trc-20260630.xsd#trc_RanchOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e89f7-35c1-7e6e-8147-1ce86d6f815b" xlink:to="loc_trc_RanchOperationsMember_019e89f7-35c1-704c-bfff-ec04093aabbc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_019e89f7-35c1-7f60-a33b-436b60ed4593" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationAdditionalInformationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e89f7-35c1-776f-9cf8-e7e2eed2396a" xlink:to="loc_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_019e89f7-35c1-7f60-a33b-436b60ed4593" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e89f7-35c1-7801-a0cd-9e3d9c4ac32d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_019e89f7-35c1-7f60-a33b-436b60ed4593" xlink:to="loc_us-gaap_Assets_019e89f7-35c1-7801-a0cd-9e3d9c4ac32d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019e89f7-35c1-790d-9dd5-b8232d1c676f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_019e89f7-35c1-7f60-a33b-436b60ed4593" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019e89f7-35c1-790d-9dd5-b8232d1c676f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_CapitalExpenditures_019e89f7-35c1-7aa3-846e-6f3448c4be35" xlink:href="trc-20260630.xsd#trc_CapitalExpenditures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationAdditionalInformationAbstract_019e89f7-35c1-7f60-a33b-436b60ed4593" xlink:to="loc_trc_CapitalExpenditures_019e89f7-35c1-7aa3-846e-6f3448c4be35" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/INVESTMENTINUNCONSOLIDATEDANDCONSOLIDATEDJOINTVENTURESAdditionalInformationDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#INVESTMENTINUNCONSOLIDATEDANDCONSOLIDATEDJOINTVENTURESAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/INVESTMENTINUNCONSOLIDATEDANDCONSOLIDATEDJOINTVENTURESAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019e89f7-35c1-759c-a84c-5bcb37cfdc4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019e89f7-35c1-759c-a84c-5bcb37cfdc4d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-7e11-a33d-90919cd64f5f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019e89f7-35c1-759c-a84c-5bcb37cfdc4d" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-7e11-a33d-90919cd64f5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-7e11-a33d-90919cd64f5f_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-7e11-a33d-90919cd64f5f" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-7e11-a33d-90919cd64f5f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-7e11-a33d-90919cd64f5f" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_PetroTravelHoldingsLlcPlazaMember_019e89f7-35c1-7bfe-bcfb-2a89f1fdcfe2" xlink:href="trc-20260630.xsd#trc_PetroTravelHoldingsLlcPlazaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_PetroTravelHoldingsLlcPlazaMember_019e89f7-35c1-7bfe-bcfb-2a89f1fdcfe2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_MajesticRealtyCo.Member_019e89f7-35c1-70e0-af20-f39697c3d78a" xlink:href="trc-20260630.xsd#trc_MajesticRealtyCo.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_MajesticRealtyCo.Member_019e89f7-35c1-70e0-af20-f39697c3d78a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC5LLCMember_019e89f7-35c1-70a2-934d-c1a7076bea4e" xlink:href="trc-20260630.xsd#trc_TRCMRC5LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_TRCMRC5LLCMember_019e89f7-35c1-70a2-934d-c1a7076bea4e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC4LLCMember_019e89f7-35c1-7f96-bdb2-b79b30a98bef" xlink:href="trc-20260630.xsd#trc_TRCMRC4LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_TRCMRC4LLCMember_019e89f7-35c1-7f96-bdb2-b79b30a98bef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC3LLCMember_019e89f7-35c1-7f52-b45c-e72eafe03219" xlink:href="trc-20260630.xsd#trc_TRCMRC3LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_TRCMRC3LLCMember_019e89f7-35c1-7f52-b45c-e72eafe03219" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC2LLCMember_019e89f7-35c1-7fe0-a5e1-3af3ced2dc95" xlink:href="trc-20260630.xsd#trc_TRCMRC2LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_TRCMRC2LLCMember_019e89f7-35c1-7fe0-a5e1-3af3ced2dc95" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCCEastMember_019e89f7-35c1-7acd-889d-59db5f770f59" xlink:href="trc-20260630.xsd#trc_TRCCEastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_TRCCEastMember_019e89f7-35c1-7acd-889d-59db5f770f59" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC1LLCMember_019e89f7-35c1-7149-ae8c-77710345fba1" xlink:href="trc-20260630.xsd#trc_TRCMRC1LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_TRCMRC1LLCMember_019e89f7-35c1-7149-ae8c-77710345fba1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCDP1LLCMember_019e89f7-35c1-7e70-baf3-d20adcf3643d" xlink:href="trc-20260630.xsd#trc_TRCDP1LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_TRCDP1LLCMember_019e89f7-35c1-7e70-baf3-d20adcf3643d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RockefellerJointVenturesMember_019e89f7-35c1-74ad-912f-6794468f8a5e" xlink:href="trc-20260630.xsd#trc_RockefellerJointVenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_RockefellerJointVenturesMember_019e89f7-35c1-74ad-912f-6794468f8a5e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_FiveWestParcelLlcMember_019e89f7-35c1-7b5b-b8ee-29917a4b17f6" xlink:href="trc-20260630.xsd#trc_FiveWestParcelLlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-757c-b8ad-05718a41bf61" xlink:to="loc_trc_FiveWestParcelLlcMember_019e89f7-35c1-7b5b-b8ee-29917a4b17f6" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019e89f7-35c1-7093-ad67-8ad6261dea9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019e89f7-35c1-759c-a84c-5bcb37cfdc4d" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019e89f7-35c1-7093-ad67-8ad6261dea9c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7093-ad67-8ad6261dea9c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019e89f7-35c1-7093-ad67-8ad6261dea9c" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7093-ad67-8ad6261dea9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-78ca-8e81-137ac79ca31e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019e89f7-35c1-7093-ad67-8ad6261dea9c" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-78ca-8e81-137ac79ca31e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC5LLCMember_019e89f7-35c1-7b4e-9a73-21ead99a83b1" xlink:href="trc-20260630.xsd#trc_TRCMRC5LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-78ca-8e81-137ac79ca31e" xlink:to="loc_trc_TRCMRC5LLCMember_019e89f7-35c1-7b4e-9a73-21ead99a83b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC4LLCMember_019e89f7-35c1-7b85-84c6-d2191a66e6cf" xlink:href="trc-20260630.xsd#trc_TRCMRC4LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-78ca-8e81-137ac79ca31e" xlink:to="loc_trc_TRCMRC4LLCMember_019e89f7-35c1-7b85-84c6-d2191a66e6cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC3LLCMember_019e89f7-35c1-78e9-b922-cf5f03704c7d" xlink:href="trc-20260630.xsd#trc_TRCMRC3LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-78ca-8e81-137ac79ca31e" xlink:to="loc_trc_TRCMRC3LLCMember_019e89f7-35c1-78e9-b922-cf5f03704c7d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC2LLCMember_019e89f7-35c1-7de6-9045-cbcab8617d49" xlink:href="trc-20260630.xsd#trc_TRCMRC2LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-78ca-8e81-137ac79ca31e" xlink:to="loc_trc_TRCMRC2LLCMember_019e89f7-35c1-7de6-9045-cbcab8617d49" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC1LLCMember_019e89f7-35c1-74b6-a836-d02c398188b2" xlink:href="trc-20260630.xsd#trc_TRCMRC1LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-78ca-8e81-137ac79ca31e" xlink:to="loc_trc_TRCMRC1LLCMember_019e89f7-35c1-74b6-a836-d02c398188b2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCCEastMember_019fd28e-4a38-7bb4-9614-b3b202f55780" xlink:href="trc-20260630.xsd#trc_TRCCEastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-78ca-8e81-137ac79ca31e" xlink:to="loc_trc_TRCCEastMember_019fd28e-4a38-7bb4-9614-b3b202f55780" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCCRockOutletCenterLLCMember_019e89f7-35c1-74c6-97be-4031daf9526a" xlink:href="trc-20260630.xsd#trc_TRCCRockOutletCenterLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-78ca-8e81-137ac79ca31e" xlink:to="loc_trc_TRCCRockOutletCenterLLCMember_019e89f7-35c1-74c6-97be-4031daf9526a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019e89f7-35c1-7a58-8fd9-6e8a15403828" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019e89f7-35c1-759c-a84c-5bcb37cfdc4d" xlink:to="loc_srt_OwnershipAxis_019e89f7-35c1-7a58-8fd9-6e8a15403828" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019e89f7-35c1-7a58-8fd9-6e8a15403828_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019e89f7-35c1-7a58-8fd9-6e8a15403828" xlink:to="loc_srt_OwnershipDomain_019e89f7-35c1-7a58-8fd9-6e8a15403828_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019e89f7-35c1-7ec7-82a9-dfb506c4a1da" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019e89f7-35c1-7a58-8fd9-6e8a15403828" xlink:to="loc_srt_OwnershipDomain_019e89f7-35c1-7ec7-82a9-dfb506c4a1da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_CentennialFoundersLlcMember_019e89f7-35c1-7b94-9588-9c804689e4d9" xlink:href="trc-20260630.xsd#trc_CentennialFoundersLlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019e89f7-35c1-7ec7-82a9-dfb506c4a1da" xlink:to="loc_trc_CentennialFoundersLlcMember_019e89f7-35c1-7b94-9588-9c804689e4d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-77ef-b65b-c65f9835ac33" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019e89f7-35c1-759c-a84c-5bcb37cfdc4d" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-77ef-b65b-c65f9835ac33" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-77ef-b65b-c65f9835ac33_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-77ef-b65b-c65f9835ac33" xlink:to="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-77ef-b65b-c65f9835ac33_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-77ac-95ae-43ffec4d61bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-77ef-b65b-c65f9835ac33" xlink:to="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-77ac-95ae-43ffec4d61bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateJointVentureMember_019e89f7-35c1-7a7b-9cea-638bea81be84" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateJointVentureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-77ac-95ae-43ffec4d61bf" xlink:to="loc_us-gaap_CorporateJointVentureMember_019e89f7-35c1-7a7b-9cea-638bea81be84" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_019e89f7-35c1-739d-b77f-7decf6de33a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_019e89f7-35c1-739d-b77f-7decf6de33a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e89f7-35c1-7845-8435-3a2d2597a62f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e89f7-35c1-7845-8435-3a2d2597a62f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019e89f7-35c1-7fd7-951b-6fae1cfd9a45" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019e89f7-35c1-7fd7-951b-6fae1cfd9a45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_EquityMethodInvestmentRightandShareofIncomeandLoss_019e89f7-35c1-7b98-a880-cad96d2f183a" xlink:href="trc-20260630.xsd#trc_EquityMethodInvestmentRightandShareofIncomeandLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_EquityMethodInvestmentRightandShareofIncomeandLoss_019e89f7-35c1-7b98-a880-cad96d2f183a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationInvestment_019e89f7-35c1-7ced-848d-9d3519de0962" xlink:href="trc-20260630.xsd#trc_EquityMethodInvestmentSummarizedFinancialInformationInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationInvestment_019e89f7-35c1-7ced-848d-9d3519de0962" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_NumberOfJointVentureContracts_019e89f7-35c1-78b8-9e98-a42d46ae94ba" xlink:href="trc-20260630.xsd#trc_NumberOfJointVentureContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_NumberOfJointVentureContracts_019e89f7-35c1-78b8-9e98-a42d46ae94ba" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DevelopmentOfBuilding_019e89f7-35c1-7f6e-a555-aed009793913" xlink:href="trc-20260630.xsd#trc_DevelopmentOfBuilding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_DevelopmentOfBuilding_019e89f7-35c1-7f6e-a555-aed009793913" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_JointVenturePercentageofRentableSpaceOccupied_019e89f7-35c1-7477-bee9-30f3f5e073ba" xlink:href="trc-20260630.xsd#trc_JointVenturePercentageofRentableSpaceOccupied"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_JointVenturePercentageofRentableSpaceOccupied_019e89f7-35c1-7477-bee9-30f3f5e073ba" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationBorrowings_019e89f7-35c1-7e8d-bb39-03626557b8dd" xlink:href="trc-20260630.xsd#trc_EquityMethodInvestmentSummarizedFinancialInformationBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationBorrowings_019e89f7-35c1-7e8d-bb39-03626557b8dd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DistributionsinExcessofInvestmentinUnconsolidatedJointVenture_019e89f7-35c1-7cd3-bab2-25852f031ad0" xlink:href="trc-20260630.xsd#trc_DistributionsinExcessofInvestmentinUnconsolidatedJointVenture"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_DistributionsinExcessofInvestmentinUnconsolidatedJointVenture_019e89f7-35c1-7cd3-bab2-25852f031ad0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_JointVentureNumberOfTenants_019e89f7-35c1-74f5-a0e3-20aeb890f824" xlink:href="trc-20260630.xsd#trc_JointVentureNumberOfTenants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_JointVentureNumberOfTenants_019e89f7-35c1-74f5-a0e3-20aeb890f824" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LeaseOfBuilding_019e89f7-35c1-7b2f-8ef5-14440a632368" xlink:href="trc-20260630.xsd#trc_LeaseOfBuilding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_LeaseOfBuilding_019e89f7-35c1-7b2f-8ef5-14440a632368" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019e89f7-35c1-7d2f-9d96-d86e97c2de94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019e89f7-35c1-7d2f-9d96-d86e97c2de94" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_PercentageOfBuildingLeased_019e89f7-35c1-7358-a965-1b1e861c05f2" xlink:href="trc-20260630.xsd#trc_PercentageOfBuildingLeased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_PercentageOfBuildingLeased_019e89f7-35c1-7358-a965-1b1e861c05f2" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationLineofCreditFacilityMaximumBorrowingCapacity_019e89f7-35c1-73b5-ac09-3fec1343003f" xlink:href="trc-20260630.xsd#trc_EquityMethodInvestmentSummarizedFinancialInformationLineofCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationLineofCreditFacilityMaximumBorrowingCapacity_019e89f7-35c1-73b5-ac09-3fec1343003f" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongTermAcresOfLandToJointVentureAtFairMarketValue_019f7dd0-4200-7081-a010-a9f447d189d4" xlink:href="trc-20260630.xsd#trc_LongTermAcresOfLandToJointVentureAtFairMarketValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_LongTermAcresOfLandToJointVentureAtFairMarketValue_019f7dd0-4200-7081-a010-a9f447d189d4" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_OtherCapitalizedDevelopmentCosts_019fa972-63ed-781f-9da1-51d8f5a34bf0" xlink:href="trc-20260630.xsd#trc_OtherCapitalizedDevelopmentCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_OtherCapitalizedDevelopmentCosts_019fa972-63ed-781f-9da1-51d8f5a34bf0" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019fa96e-877c-787d-ac50-26bb5c50d8b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_us-gaap_Revenues_019fa96e-877c-787d-ac50-26bb5c50d8b1" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DeferredGainOnContributionOfLand_019fa96f-57d3-7f5f-afbc-d5a0ee9b6f60" xlink:href="trc-20260630.xsd#trc_DeferredGainOnContributionOfLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_DeferredGainOnContributionOfLand_019fa96f-57d3-7f5f-afbc-d5a0ee9b6f60" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019fa970-36ff-7033-b8c3-71a0807597dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019fa970-36ff-7033-b8c3-71a0807597dc" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DebtInstrumentNumberOfExtensionOptions_019fa970-ff4f-797f-b306-51098c68caf0" xlink:href="trc-20260630.xsd#trc_DebtInstrumentNumberOfExtensionOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_DebtInstrumentNumberOfExtensionOptions_019fa970-ff4f-797f-b306-51098c68caf0" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_DebtInstrumentExtensionOptionTerm_019fa971-c2c8-70ac-b0ce-11ce65710b62" xlink:href="trc-20260630.xsd#trc_DebtInstrumentExtensionOptionTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_trc_DebtInstrumentExtensionOptionTerm_019fa971-c2c8-70ac-b0ce-11ce65710b62" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019e89f7-35c1-756a-bd52-30e6634cdd03" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_us-gaap_EquityMethodInvestments_019e89f7-35c1-756a-bd52-30e6634cdd03" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019e89f7-35c1-731c-8d8d-c79ab6da1229" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7452-9f60-5a157c12def6" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019e89f7-35c1-731c-8d8d-c79ab6da1229" xlink:type="arc" order="23"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/INVESTMENTINUNCONSOLIDATEDANDCONSOLIDATEDJOINTVENTURESScheduleofCondensedStatementsofOperationsandBalanceSheetInformationofConsolidatedandUnconsolidatedJointVenturesDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#INVESTMENTINUNCONSOLIDATEDANDCONSOLIDATEDJOINTVENTURESScheduleofCondensedStatementsofOperationsandBalanceSheetInformationofConsolidatedandUnconsolidatedJointVenturesDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/INVESTMENTINUNCONSOLIDATEDANDCONSOLIDATEDJOINTVENTURESScheduleofCondensedStatementsofOperationsandBalanceSheetInformationofConsolidatedandUnconsolidatedJointVenturesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7ef5-abad-348df896474d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019e89f7-35c1-79b4-812f-416363fd241a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7ef5-abad-348df896474d" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019e89f7-35c1-79b4-812f-416363fd241a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019e89f7-35c1-76db-aa3a-f3569785e2b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019e89f7-35c1-79b4-812f-416363fd241a" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019e89f7-35c1-76db-aa3a-f3569785e2b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-76db-aa3a-f3569785e2b4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019e89f7-35c1-76db-aa3a-f3569785e2b4" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-76db-aa3a-f3569785e2b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019e89f7-35c1-76db-aa3a-f3569785e2b4" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_PetroTravelHoldingsLlcPlazaMember_019e89f7-35c1-7334-b5ed-6f000caa33b6" xlink:href="trc-20260630.xsd#trc_PetroTravelHoldingsLlcPlazaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:to="loc_trc_PetroTravelHoldingsLlcPlazaMember_019e89f7-35c1-7334-b5ed-6f000caa33b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCCRockOutletCenterLLCMember_019e89f7-35c1-75fb-94e6-174ab8bf9298" xlink:href="trc-20260630.xsd#trc_TRCCRockOutletCenterLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:to="loc_trc_TRCCRockOutletCenterLLCMember_019e89f7-35c1-75fb-94e6-174ab8bf9298" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC1LLCMember_019e89f7-35c1-78d1-aba7-aaf6bb1bacf2" xlink:href="trc-20260630.xsd#trc_TRCMRC1LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:to="loc_trc_TRCMRC1LLCMember_019e89f7-35c1-78d1-aba7-aaf6bb1bacf2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC2LLCMember_019e89f7-35c1-7098-8ef0-761bbe2f78a1" xlink:href="trc-20260630.xsd#trc_TRCMRC2LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:to="loc_trc_TRCMRC2LLCMember_019e89f7-35c1-7098-8ef0-761bbe2f78a1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC3LLCMember_019e89f7-35c1-7b69-baa4-6c8352addac0" xlink:href="trc-20260630.xsd#trc_TRCMRC3LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:to="loc_trc_TRCMRC3LLCMember_019e89f7-35c1-7b69-baa4-6c8352addac0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC4LLCMember_019e89f7-35c1-7b70-99c3-078555f09393" xlink:href="trc-20260630.xsd#trc_TRCMRC4LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:to="loc_trc_TRCMRC4LLCMember_019e89f7-35c1-7b70-99c3-078555f09393" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC5LLCMember_019e89f7-35c1-7b92-be43-40ad6349192f" xlink:href="trc-20260630.xsd#trc_TRCMRC5LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:to="loc_trc_TRCMRC5LLCMember_019e89f7-35c1-7b92-be43-40ad6349192f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCDP1LLCMember_019e89f7-35c1-7d8e-b65b-fbbfa4dbe588" xlink:href="trc-20260630.xsd#trc_TRCDP1LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:to="loc_trc_TRCDP1LLCMember_019e89f7-35c1-7d8e-b65b-fbbfa4dbe588" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember_019e89f7-35c1-7200-be1e-03ec84d6fae8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvesteesMember_019e89f7-35c1-7200-be1e-03ec84d6fae8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_CentennialFoundersLlcMember_019e89f7-35c1-7405-9584-ad84ee2d53f0" xlink:href="trc-20260630.xsd#trc_CentennialFoundersLlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019e89f7-35c1-7555-9370-51ccaf28588c" xlink:to="loc_trc_CentennialFoundersLlcMember_019e89f7-35c1-7405-9584-ad84ee2d53f0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-7689-a4cc-f4819959301c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019e89f7-35c1-79b4-812f-416363fd241a" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-7689-a4cc-f4819959301c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-7689-a4cc-f4819959301c_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-7689-a4cc-f4819959301c" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-7689-a4cc-f4819959301c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-73f6-80c5-d7ca2d6bd438" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-7689-a4cc-f4819959301c" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-73f6-80c5-d7ca2d6bd438" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_PetroTravelHoldingsLlcPlazaMember_019e89f7-35c1-7b3e-abab-51d165b6d1c7" xlink:href="trc-20260630.xsd#trc_PetroTravelHoldingsLlcPlazaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-73f6-80c5-d7ca2d6bd438" xlink:to="loc_trc_PetroTravelHoldingsLlcPlazaMember_019e89f7-35c1-7b3e-abab-51d165b6d1c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCCRockOutletCenterLLCMember_019e89f7-35c1-7128-94dc-c75b0cfe9fcf" xlink:href="trc-20260630.xsd#trc_TRCCRockOutletCenterLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-73f6-80c5-d7ca2d6bd438" xlink:to="loc_trc_TRCCRockOutletCenterLLCMember_019e89f7-35c1-7128-94dc-c75b0cfe9fcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC1LLCMember_019e89f7-35c1-7225-bae8-2e4c06ea903b" xlink:href="trc-20260630.xsd#trc_TRCMRC1LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-73f6-80c5-d7ca2d6bd438" xlink:to="loc_trc_TRCMRC1LLCMember_019e89f7-35c1-7225-bae8-2e4c06ea903b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC2LLCMember_019e89f7-35c1-7767-9ac2-004a4595f601" xlink:href="trc-20260630.xsd#trc_TRCMRC2LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-73f6-80c5-d7ca2d6bd438" xlink:to="loc_trc_TRCMRC2LLCMember_019e89f7-35c1-7767-9ac2-004a4595f601" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC3LLCMember_019e89f7-35c1-7fc8-9bf7-0d0d4e78d578" xlink:href="trc-20260630.xsd#trc_TRCMRC3LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-73f6-80c5-d7ca2d6bd438" xlink:to="loc_trc_TRCMRC3LLCMember_019e89f7-35c1-7fc8-9bf7-0d0d4e78d578" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC4LLCMember_019e89f7-35c1-7afb-8379-903b36dd160c" xlink:href="trc-20260630.xsd#trc_TRCMRC4LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-73f6-80c5-d7ca2d6bd438" xlink:to="loc_trc_TRCMRC4LLCMember_019e89f7-35c1-7afb-8379-903b36dd160c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCMRC5LLCMember_019e89f7-35c1-7678-a20e-f57e17110f24" xlink:href="trc-20260630.xsd#trc_TRCMRC5LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-73f6-80c5-d7ca2d6bd438" xlink:to="loc_trc_TRCMRC5LLCMember_019e89f7-35c1-7678-a20e-f57e17110f24" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract_019e89f7-35c1-73c5-8410-3348082c05a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7ef5-abad-348df896474d" xlink:to="loc_us-gaap_IncomeStatementAbstract_019e89f7-35c1-73c5-8410-3348082c05a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e89f7-35c1-796c-8444-813d8a3af91b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019e89f7-35c1-73c5-8410-3348082c05a4" xlink:to="loc_us-gaap_Revenues_019e89f7-35c1-796c-8444-813d8a3af91b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019e89f7-35c1-7e43-838f-e64126668d2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019e89f7-35c1-73c5-8410-3348082c05a4" xlink:to="loc_us-gaap_GrossProfit_019e89f7-35c1-7e43-838f-e64126668d2f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationEquityInEarningsLoss_019e89f7-35c1-7ec4-9ad6-5ca56de19449" xlink:href="trc-20260630.xsd#trc_EquityMethodInvestmentSummarizedFinancialInformationEquityInEarningsLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019e89f7-35c1-73c5-8410-3348082c05a4" xlink:to="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationEquityInEarningsLoss_019e89f7-35c1-7ec4-9ad6-5ca56de19449" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationTenantAllowanceAmortization_019e89f7-35c1-7bcd-8a9a-afb617d1b308" xlink:href="trc-20260630.xsd#trc_EquityMethodInvestmentSummarizedFinancialInformationTenantAllowanceAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019e89f7-35c1-73c5-8410-3348082c05a4" xlink:to="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationTenantAllowanceAmortization_019e89f7-35c1-7bcd-8a9a-afb617d1b308" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_019e89f7-35c1-7004-9d65-b3bfe304141f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019e89f7-35c1-7ef5-abad-348df896474d" xlink:to="loc_us-gaap_StatementOfFinancialPositionAbstract_019e89f7-35c1-7004-9d65-b3bfe304141f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e89f7-35c1-76fa-86e0-5d7e2edbedb8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_019e89f7-35c1-7004-9d65-b3bfe304141f" xlink:to="loc_us-gaap_Assets_019e89f7-35c1-76fa-86e0-5d7e2edbedb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationBorrowings_019e89f7-35c1-78c1-9cd5-03af260507ae" xlink:href="trc-20260630.xsd#trc_EquityMethodInvestmentSummarizedFinancialInformationBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_019e89f7-35c1-7004-9d65-b3bfe304141f" xlink:to="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationBorrowings_019e89f7-35c1-78c1-9cd5-03af260507ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f7-35c1-796b-a679-4a358ca59fe5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_019e89f7-35c1-7004-9d65-b3bfe304141f" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e89f7-35c1-796b-a679-4a358ca59fe5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationInvestment_019e89f7-35c1-7464-81ca-2e2b6957a8e3" xlink:href="trc-20260630.xsd#trc_EquityMethodInvestmentSummarizedFinancialInformationInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_019e89f7-35c1-7004-9d65-b3bfe304141f" xlink:to="loc_trc_EquityMethodInvestmentSummarizedFinancialInformationInvestment_019e89f7-35c1-7464-81ca-2e2b6957a8e3" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/RELATEDPARTYTRANSACTIONSDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#RELATEDPARTYTRANSACTIONSDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/RELATEDPARTYTRANSACTIONSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019e89f7-35c1-77f9-b6b5-38ba09948c46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e89f7-35c1-7127-a86f-f4587cc193f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e89f7-35c1-77f9-b6b5-38ba09948c46" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e89f7-35c1-7127-a86f-f4587cc193f1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019e89f7-35c1-75dc-9ac1-08e540686c26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e89f7-35c1-7127-a86f-f4587cc193f1" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019e89f7-35c1-75dc-9ac1-08e540686c26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019e89f7-35c1-75dc-9ac1-08e540686c26_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019e89f7-35c1-75dc-9ac1-08e540686c26" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019e89f7-35c1-75dc-9ac1-08e540686c26_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019e89f7-35c1-78be-b0aa-4f7f32b09cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019e89f7-35c1-75dc-9ac1-08e540686c26" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019e89f7-35c1-78be-b0aa-4f7f32b09cb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_StateWaterProjectContractsMember_019e89f7-35c1-7b01-b4f5-055300787245" xlink:href="trc-20260630.xsd#trc_StateWaterProjectContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019e89f7-35c1-78be-b0aa-4f7f32b09cb4" xlink:to="loc_trc_StateWaterProjectContractsMember_019e89f7-35c1-7b01-b4f5-055300787245" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_ConsultingServicesMember_019fb606-6780-7ad5-ae83-3ac9702fcdcb" xlink:href="trc-20260630.xsd#trc_ConsultingServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019e89f7-35c1-78be-b0aa-4f7f32b09cb4" xlink:to="loc_trc_ConsultingServicesMember_019fb606-6780-7ad5-ae83-3ac9702fcdcb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e89f7-35c1-7c6b-af07-56690c2fe49d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e89f7-35c1-7127-a86f-f4587cc193f1" xlink:to="loc_srt_CounterpartyNameAxis_019e89f7-35c1-7c6b-af07-56690c2fe49d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c1-7c6b-af07-56690c2fe49d_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-35c1-7c6b-af07-56690c2fe49d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c1-7c6b-af07-56690c2fe49d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c1-76ec-b85d-bd08cf356074" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e89f7-35c1-7c6b-af07-56690c2fe49d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c1-76ec-b85d-bd08cf356074" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_WheelerRidgeMaricopaWaterStorageDistrictMember_019e89f7-35c1-74fa-83cd-630570b96585" xlink:href="trc-20260630.xsd#trc_WheelerRidgeMaricopaWaterStorageDistrictMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e89f7-35c1-76ec-b85d-bd08cf356074" xlink:to="loc_trc_WheelerRidgeMaricopaWaterStorageDistrictMember_019e89f7-35c1-74fa-83cd-630570b96585" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-7078-b15a-1fbd0faf7b55" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e89f7-35c1-7127-a86f-f4587cc193f1" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-7078-b15a-1fbd0faf7b55" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-7078-b15a-1fbd0faf7b55_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-7078-b15a-1fbd0faf7b55" xlink:to="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-7078-b15a-1fbd0faf7b55_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-739a-8ebd-fda0225bdaeb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-7078-b15a-1fbd0faf7b55" xlink:to="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-739a-8ebd-fda0225bdaeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ManagementMember_019e89f7-35c1-7be7-a07a-ea5b94ca3e73" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ManagementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-739a-8ebd-fda0225bdaeb" xlink:to="loc_srt_ManagementMember_019e89f7-35c1-7be7-a07a-ea5b94ca3e73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RelatedPartyTransactionAreaofLand_019e89f7-35c1-704d-8b5e-359e5685568e" xlink:href="trc-20260630.xsd#trc_RelatedPartyTransactionAreaofLand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e89f7-35c1-77f9-b6b5-38ba09948c46" xlink:to="loc_trc_RelatedPartyTransactionAreaofLand_019e89f7-35c1-704d-8b5e-359e5685568e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_LongtermWaterAssetsWaterContractsVolume_019e89f7-35c1-7f7c-949b-c1239c8fcbcd" xlink:href="trc-20260630.xsd#trc_LongtermWaterAssetsWaterContractsVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e89f7-35c1-77f9-b6b5-38ba09948c46" xlink:to="loc_trc_LongtermWaterAssetsWaterContractsVolume_019e89f7-35c1-7f7c-949b-c1239c8fcbcd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_NumberOfDirectors_019e89f7-35c1-7493-8744-7cc85df36e70" xlink:href="trc-20260630.xsd#trc_NumberOfDirectors"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e89f7-35c1-77f9-b6b5-38ba09948c46" xlink:to="loc_trc_NumberOfDirectors_019e89f7-35c1-7493-8744-7cc85df36e70" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_019e89f7-35c1-7514-944a-5c71b1b1ff4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e89f7-35c1-77f9-b6b5-38ba09948c46" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_019e89f7-35c1-7514-944a-5c71b1b1ff4c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_RelatedPartyTransactionTerm_019fb607-9a8a-7357-90d0-67261ba25664" xlink:href="trc-20260630.xsd#trc_RelatedPartyTransactionTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e89f7-35c1-77f9-b6b5-38ba09948c46" xlink:to="loc_trc_RelatedPartyTransactionTerm_019fb607-9a8a-7357-90d0-67261ba25664" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://tejonranch.com/role/SUBSEQUENTEVENTDetails" xlink:type="simple" xlink:href="trc-20260630.xsd#SUBSEQUENTEVENTDetails"/>
  <link:definitionLink xlink:role="http://tejonranch.com/role/SUBSEQUENTEVENTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_019e89f7-35c1-71b3-9ca2-03e611cd9be9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_019e89f7-35c1-73c3-a135-c96d13381ffa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_019e89f7-35c1-71b3-9ca2-03e611cd9be9" xlink:to="loc_us-gaap_SubsequentEventTable_019e89f7-35c1-73c3-a135-c96d13381ffa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-79c0-ac0d-f482edbaed89" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019e89f7-35c1-73c3-a135-c96d13381ffa" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-79c0-ac0d-f482edbaed89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-79c0-ac0d-f482edbaed89_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-79c0-ac0d-f482edbaed89" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-79c0-ac0d-f482edbaed89_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-7a46-ba3c-4ad351d27bb8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019e89f7-35c1-79c0-ac0d-f482edbaed89" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-7a46-ba3c-4ad351d27bb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_trc_TRCDP1LLCMember_019fb60b-8538-7003-9a6a-fa6b6fbcf710" xlink:href="trc-20260630.xsd#trc_TRCDP1LLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019e89f7-35c1-7a46-ba3c-4ad351d27bb8" xlink:to="loc_trc_TRCDP1LLCMember_019fb60b-8538-7003-9a6a-fa6b6fbcf710" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-79d9-8702-06d2cb7dab47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019e89f7-35c1-73c3-a135-c96d13381ffa" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-79d9-8702-06d2cb7dab47" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-79d9-8702-06d2cb7dab47_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-79d9-8702-06d2cb7dab47" xlink:to="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-79d9-8702-06d2cb7dab47_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-74bd-9cc3-3676986d9616" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e89f7-35c1-79d9-8702-06d2cb7dab47" xlink:to="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-74bd-9cc3-3676986d9616" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateJointVentureMember_019e89f7-35c1-7696-82f8-3842b3000553" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateJointVentureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e89f7-35c1-74bd-9cc3-3676986d9616" xlink:to="loc_us-gaap_CorporateJointVentureMember_019e89f7-35c1-7696-82f8-3842b3000553" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019fb60d-2faa-764e-a2a5-e7b9fbb03e56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019e89f7-35c1-73c3-a135-c96d13381ffa" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019fb60d-2faa-764e-a2a5-e7b9fbb03e56" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019fb60d-2faa-764e-a2a5-e7b9fbb03e56_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019fb60d-2faa-764e-a2a5-e7b9fbb03e56" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019fb60d-2faa-764e-a2a5-e7b9fbb03e56_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019fb60d-2faa-7a9c-afe5-45105115c6b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019fb60d-2faa-764e-a2a5-e7b9fbb03e56" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019fb60d-2faa-7a9c-afe5-45105115c6b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019fb60d-5509-7cac-8f36-1b4dbb9af63b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019fb60d-2faa-7a9c-afe5-45105115c6b4" xlink:to="loc_us-gaap_SubsequentEventMember_019fb60d-5509-7cac-8f36-1b4dbb9af63b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_019e89f7-35c1-7ecc-a3d2-3868d2c94444" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019e89f7-35c1-71b3-9ca2-03e611cd9be9" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_019e89f7-35c1-7ecc-a3d2-3868d2c94444" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
