sub·​stan·​ti·​ate | \ səb-ˈstan(t)-shē-ˌāt How to pronounce substantiate (audio) \
substantiated; substantiating

Definition of substantiate

transitive verb

1 : to give substance or form to : embody
2 : to establish by proof or competent evidence : verify substantiate a charge

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Other Words from substantiate

substantiation \ səb-​ˌstan(t)-​shē-​ˈā-​shən How to pronounce substantiation (audio) \ noun
substantiative \ səb-​ˈstan(t)-​shē-​ˌā-​tiv How to pronounce substantiative (audio) \ adjective

Synonyms & Antonyms for substantiate


demonstrate, establish, prove, show



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Choose the Right Synonym for 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

Examples of substantiate in a Sentence

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

Recent Examples on the Web

One was given the impossible task of substantiating Mr Trump’s claim that his election saw massive vote-rigging. The Economist, "There is a need for fresh thinking on human rights," 8 Aug. 2019 None of the charges were ever substantiated, the officials added. Fox News, "Pentagon nominee, Air Force Gen. John Hyten, denies sex misconduct allegations, says 'nothing happened, ever'," 31 July 2019 And its alleged benefits to the body, mind, and spirit have long been widely substantiated. Roy S. Johnson |, al, "Johnson: We, and our stressed out children, need yoga," 22 Aug. 2019 One was given the impossible task of substantiating Mr Trump’s claim that his election saw massive vote-rigging. The Economist, "There is a need for fresh thinking on human rights," 8 Aug. 2019 Not all of the complaints have been substantiated, and some of the legal cases have ended in settlements. Frederick Melo, Twin Cities, "West Side apartment building approved amid wage dispute involving developer," 7 Aug. 2019 There’s no record to substantiate the five-year claim, and tests performed by investigators failed to produce the results the company boasted, Feuer said. Los Angeles Times, "Company’s wildfire protection spray doesn’t work as advertised, prosecutors say," 6 Aug. 2019 The Air Force Office of Special Investigations' probe produced a 1,400-page report that did not substantiate Spletstoser's claims, according to the military and senators on the panel, who were able to review it. Karoun Demirjian, Anchorage Daily News, "Senate panel votes to advance Trump’s pick to be military’s No. 2, despite sexual assault allegations," 31 July 2019 None of which, Hyten testified, were ever substantiated. CBS News, "Senate holds confirmation hearing for Gen. John Hyten to Joint Chiefs job amid assault allegations," 30 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'substantiate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of substantiate

1610, in the meaning defined at sense 1

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Statistics for substantiate

Last Updated

8 Sep 2019

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Time Traveler for substantiate

The first known use of substantiate was in 1610

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English Language Learners Definition of substantiate

formal : to prove the truth of (something)

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Comments on substantiate

What made you want to look up substantiate? Please tell us where you read or heard it (including the quote, if possible).


formidable, illustrious, or eminent

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