sub·​stan·​ti·​ate | \səb-ˈstan(t)-shē-ˌāt \
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 \ noun
substantiative \səb-​ˈstan(t)-​shē-​ˌā-​tiv \ adjective

Synonyms & Antonyms for substantiate


demonstrate, document, establish, prove, validate


disprove, rebut, refute

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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

In cases like Rylett’s, YouTube terminates channels when allegations are substantiated by a guilty plea or a conviction. Bijan Stephen, The Verge, "The co-founder of a prominent tween girl YouTube network has been arrested for molesting a minor," 24 Sep. 2018 Members of the Senate Veterans' Affairs Committee have been working through all of the allegations, but have not substantiated the claims, with little documentation available to corroborate them. Jeremy Diamond, CNN, "Sarah Sanders defends Jackson's 'impeccable' record," 25 Apr. 2018 The revelation substantiates a leading criticism of the law, which was otherwise pitched as a compassionate measure to help people suffering from life-threatening illnesses obtain easier access to experimental therapies. Beth Mole, Ars Technica, "Drug access law Trump just signed will cripple FDA—senator is making sure of it," 1 June 2018 Williams testified to the Legislature that the inability to consider past substantiated claims and discipline has left district officials feeling frustrated. Diana Lambert, sacbee, "A teacher allegedly harassed students every few years. School leaders say they're powerless," 8 May 2018 Fieger said male and female employees, including executives who are no longer at the station, knew what was going on and can substantiate Edwards’ claims. Tresa Baldas, Detroit Free Press, "WXYZ yanks anchor Malcom Maddox off the air amid sex harassment accusation," 6 Mar. 2018 But this is the first time it has been substantiated by flight records. Aaron Blake, Washington Post, "Trump has some explaining to do about his 2013 Russia trip," 23 Apr. 2018 However, after more than a year, the Turkish authorities have still not been able to provide any credible evidence to substantiate the allegation against Taner, or indeed to implicate him in any criminal wrongdoing. Salil Shetty, Time, "Today I Visited My Turkish Colleague in Prison. Erdogan’s Crackdown Must Stop," 20 June 2018 The Legislature would release complaints and findings in cases where the allegations are substantiated against a lawmaker or high-level staff, as has been its practice over the past six months. Melody Gutierrez,, "California lawmakers propose overhaul of sex harassment probes," 15 June 2018

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

1 Dec 2018

Look-up Popularity

Time Traveler for substantiate

The first known use of substantiate was in 1610

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English Language Learners Definition of substantiate

: 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).


to move with a clumsy heavy tread

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