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transitive verb sub·stan·ti·ate \səb-ˈstan(t)-shē-ˌāt\

: to prove the truth of (something)


Full Definition of SUBSTANTIATE

:  to give substance or form to :  embody
:  to establish by proof or competent evidence :  verify <substantiate a charge>
sub·stan·ti·a·tion \-ˌstan(t)-shē-ˈā-shən\ noun
sub·stan·ti·a·tive \-ˈstan(t)-shē-ˌā-tiv\ adjective


  1. <substantiated his claim to local mountaineering fame with a photo of himself on the summit of Mount McKinley>
  2. <Mr. MacGregor couldn't substantiate that it was Peter, and not some other rabbit, in the cabbage patch.>

First Known Use of SUBSTANTIATE


Synonym Discussion of SUBSTANTIATE

confirm, corroborate, substantiate, verify, authenticate, validate mean to attest to the truth or validity of something. confirm implies the removing of doubts by an authoritative statement or indisputable fact <confirmed the reports>. corroborate suggests the strengthening of what is already partly established <witnesses corroborated his story>. substantiate implies the offering of evidence that sustains the contention <the claims have yet to be substantiated>. verify implies the establishing of correspondence of actual facts or details with those proposed or guessed at <all statements of fact in the article have been verified>. authenticate implies establishing genuineness by adducing legal or official documents or expert opinion <handwriting experts authenticated the diaries>. validate implies establishing validity by authoritative affirmation or by factual proof <validated the hypothesis by experiments>.

Other Legal Terms

actionable, alienable, carceral, chattel, complicity, decedent, larceny, malfeasance, modus operandi


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