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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:b11cb410-a02d-4ebc-9b5b-2dcea7f08b3f,g:0822eb99-27c3-49f9-a2d9-85f60afa9c1e-->
<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://www.bxp.com/role/Cover" xlink:type="simple" xlink:href="bxp-20251028.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.bxp.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_e1ff1a29-9610-4345-b073-020f2645f540" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntitiesTable_e1ff1a29-9610-4345-b073-020f2645f540" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_76a12a9b-2db2-43b6-8e43-ebdd82c36977" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_e1ff1a29-9610-4345-b073-020f2645f540" xlink:to="loc_dei_LegalEntityAxis_76a12a9b-2db2-43b6-8e43-ebdd82c36977" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_76a12a9b-2db2-43b6-8e43-ebdd82c36977_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_76a12a9b-2db2-43b6-8e43-ebdd82c36977" xlink:to="loc_dei_EntityDomain_76a12a9b-2db2-43b6-8e43-ebdd82c36977_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_877f248c-d91d-4d29-9c3f-23965a5419e1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_76a12a9b-2db2-43b6-8e43-ebdd82c36977" xlink:to="loc_dei_EntityDomain_877f248c-d91d-4d29-9c3f-23965a5419e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bxp_BostonPropertiesLimitedPartnershipMember_dccd5fcf-d9f2-40ee-b9eb-957ad139313d" xlink:href="bxp-20251028.xsd#bxp_BostonPropertiesLimitedPartnershipMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_877f248c-d91d-4d29-9c3f-23965a5419e1" xlink:to="loc_bxp_BostonPropertiesLimitedPartnershipMember_dccd5fcf-d9f2-40ee-b9eb-957ad139313d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_9e5cc0b9-62ef-4404-97d9-c12823e6542e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_DocumentType_9e5cc0b9-62ef-4404-97d9-c12823e6542e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_174a69a1-e743-4488-b569-c661181e55be" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_DocumentPeriodEndDate_174a69a1-e743-4488-b569-c661181e55be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_c7d31522-2bdd-49a8-8852-d1a33cae6227" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntityRegistrantName_c7d31522-2bdd-49a8-8852-d1a33cae6227" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_90ca8c48-82fb-4b22-8630-5830c4551233" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntityIncorporationStateCountryCode_90ca8c48-82fb-4b22-8630-5830c4551233" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_2ea4fa2a-973a-4d69-bda9-37b0eb117b50" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntityFileNumber_2ea4fa2a-973a-4d69-bda9-37b0eb117b50" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_9e239f98-2585-4ca7-b01e-97863191d187" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntityTaxIdentificationNumber_9e239f98-2585-4ca7-b01e-97863191d187" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_5b83b29e-290e-4cf3-95c1-714da1a436ad" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntityAddressAddressLine1_5b83b29e-290e-4cf3-95c1-714da1a436ad" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_a65c6784-1a97-41fa-995b-b7923d1561e5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntityAddressCityOrTown_a65c6784-1a97-41fa-995b-b7923d1561e5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_83ec9321-0fbc-481d-8f37-4a1f9b4690c2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntityAddressStateOrProvince_83ec9321-0fbc-481d-8f37-4a1f9b4690c2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_e7026511-982d-4a37-b798-5bdd10da167b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntityAddressPostalZipCode_e7026511-982d-4a37-b798-5bdd10da167b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_d9b7b22b-ce64-48a7-b4d5-126acfa8d8b6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_CityAreaCode_d9b7b22b-ce64-48a7-b4d5-126acfa8d8b6" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_ad5c6184-f5e8-49f5-9728-43876f5e9b02" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_LocalPhoneNumber_ad5c6184-f5e8-49f5-9728-43876f5e9b02" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_2026bffd-9cb0-4912-9eab-5622586df8b3" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_WrittenCommunications_2026bffd-9cb0-4912-9eab-5622586df8b3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_48872fea-9c5a-4f81-88f5-f23b67ddb009" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_SolicitingMaterial_48872fea-9c5a-4f81-88f5-f23b67ddb009" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_30532b62-155b-4a4c-b8b8-5d571be70074" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_PreCommencementTenderOffer_30532b62-155b-4a4c-b8b8-5d571be70074" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_d432a003-e286-4a3f-a1b9-e3fae7587548" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_d432a003-e286-4a3f-a1b9-e3fae7587548" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_d25c23cc-d2ea-455b-a7a1-4861edb25f6f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntityEmergingGrowthCompany_d25c23cc-d2ea-455b-a7a1-4861edb25f6f" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_3a222aee-277d-42b2-bf92-e470548ad57f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_EntityCentralIndexKey_3a222aee-277d-42b2-bf92-e470548ad57f" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_6232ffa7-fbed-459b-b9ce-1378c86d5ba0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_AmendmentFlag_6232ffa7-fbed-459b-b9ce-1378c86d5ba0" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_3cdb0681-2293-4619-8d28-7e38ea08825d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_Security12bTitle_3cdb0681-2293-4619-8d28-7e38ea08825d" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_5227ea66-1a0c-412d-9fcd-982859aeb688" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_TradingSymbol_5227ea66-1a0c-412d-9fcd-982859aeb688" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_c6a65b8f-22d5-4e68-ba0e-292361b2372d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_ee1c2157-ee9c-4c2d-be48-5ea00d20ace8" xlink:to="loc_dei_SecurityExchangeName_c6a65b8f-22d5-4e68-ba0e-292361b2372d" xlink:type="arc" order="21"/>
  </link:definitionLink>
</link:linkbase>
