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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019f1923-3241-779d-8515-9710ff6f5871,g:30598690-447b-4312-889d-f8b715daf3e9-->
<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.energyvault.com/role/Cover" xlink:type="simple" xlink:href="nrgv-20260626.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.energyvault.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019f1923-3241-7980-b1bc-332171980108" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_DocumentInformationTable_019f1923-3241-7980-b1bc-332171980108" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019f1923-3241-7bd1-bbab-316db9fc8610" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019f1923-3241-7980-b1bc-332171980108" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019f1923-3241-7bd1-bbab-316db9fc8610" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019f1923-3241-7bd1-bbab-316db9fc8610_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019f1923-3241-7bd1-bbab-316db9fc8610" xlink:to="loc_us-gaap_ClassOfStockDomain_019f1923-3241-7bd1-bbab-316db9fc8610_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019f1923-3241-7734-b175-a6f3e7bd3765" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019f1923-3241-7bd1-bbab-316db9fc8610" xlink:to="loc_us-gaap_ClassOfStockDomain_019f1923-3241-7734-b175-a6f3e7bd3765" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_nrgv_CommonStockParValue00001PerShareMember_019f1923-3241-788a-ae00-097a91cf09b2" xlink:href="nrgv-20260626.xsd#nrgv_CommonStockParValue00001PerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019f1923-3241-7734-b175-a6f3e7bd3765" xlink:to="loc_nrgv_CommonStockParValue00001PerShareMember_019f1923-3241-788a-ae00-097a91cf09b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019f1923-3241-78d6-a0a3-97d4c8cbb17a" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_DocumentType_019f1923-3241-78d6-a0a3-97d4c8cbb17a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019f1923-3241-75e4-a631-1fa011eb0bec" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_DocumentPeriodEndDate_019f1923-3241-75e4-a631-1fa011eb0bec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019f1923-3241-7ba3-9bc1-efa8833138a8" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityRegistrantName_019f1923-3241-7ba3-9bc1-efa8833138a8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019f1923-3241-7fd1-92d0-edab1e368ad6" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019f1923-3241-7fd1-92d0-edab1e368ad6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019f1923-3241-7a06-89b6-307d6f2208f9" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityFileNumber_019f1923-3241-7a06-89b6-307d6f2208f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019f1923-3241-72d6-8d8f-705bdb975394" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityTaxIdentificationNumber_019f1923-3241-72d6-8d8f-705bdb975394" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019f1923-3241-75d6-80b2-ac7897bf62ab" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityAddressAddressLine1_019f1923-3241-75d6-80b2-ac7897bf62ab" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019f1923-3241-7a29-880b-a5605910f3eb" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityAddressAddressLine2_019f1923-3241-7a29-880b-a5605910f3eb" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019f1923-3241-7911-8850-93403d8fd0de" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityAddressCityOrTown_019f1923-3241-7911-8850-93403d8fd0de" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019f1923-3241-778d-9870-f0baf5c69922" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityAddressStateOrProvince_019f1923-3241-778d-9870-f0baf5c69922" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019f1923-3241-7e92-882b-e778e612807b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityAddressPostalZipCode_019f1923-3241-7e92-882b-e778e612807b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019f1923-3241-7c2e-bb99-dad4864b018e" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_CityAreaCode_019f1923-3241-7c2e-bb99-dad4864b018e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019f1923-3241-7b92-8fa4-5a83a60dbc27" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_LocalPhoneNumber_019f1923-3241-7b92-8fa4-5a83a60dbc27" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019f1923-3241-7136-b537-7014f0f72849" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_WrittenCommunications_019f1923-3241-7136-b537-7014f0f72849" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019f1923-3241-7caa-a9a2-c059a733747d" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_SolicitingMaterial_019f1923-3241-7caa-a9a2-c059a733747d" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019f1923-3241-7d80-b937-5162c7f5fcbd" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_PreCommencementTenderOffer_019f1923-3241-7d80-b937-5162c7f5fcbd" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019f1923-3241-779d-8f1d-bd7f9eb97d5a" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019f1923-3241-779d-8f1d-bd7f9eb97d5a" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019f1923-3241-7e2a-b511-1bd469e3ee13" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_Security12bTitle_019f1923-3241-7e2a-b511-1bd469e3ee13" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019f1923-3241-70f5-a026-88e0736b93f1" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_TradingSymbol_019f1923-3241-70f5-a026-88e0736b93f1" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019f1923-3241-7d7d-a58f-bb3a4a05ba33" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_SecurityExchangeName_019f1923-3241-7d7d-a58f-bb3a4a05ba33" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019f1923-3241-7f67-bc3b-9358c091891f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityEmergingGrowthCompany_019f1923-3241-7f67-bc3b-9358c091891f" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_019f1923-3241-785e-a90d-5bb7fa2521e6" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityExTransitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityExTransitionPeriod_019f1923-3241-785e-a90d-5bb7fa2521e6" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019f1923-3241-793d-8052-5fda378ee7d3" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_EntityCentralIndexKey_019f1923-3241-793d-8052-5fda378ee7d3" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019f1923-3241-7bba-96e4-e5b6b36b2178" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f1923-3241-7bef-8d7d-2d3f27b5a13b" xlink:to="loc_dei_AmendmentFlag_019f1923-3241-7bba-96e4-e5b6b36b2178" xlink:type="arc" order="23"/>
  </link:definitionLink>
</link:linkbase>
