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



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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 The court filing says prosecutors failed to release key evidence that would help substantiate their claims. Alejandra Salazar,, "Lori Loughlin & Mossimo Giannulli Didn’t Think They Were Making Bribe Payments To USC, Court Docs Claim," 1 Feb. 2020 Benjamin Chambers, a spokesman for the youth authority, said both reports were not substantiated. oregonlive, "Oregon’s girls juvenile facility reports sexual abuse rates twice national average, new federal data shows," 3 Jan. 2020 In fact, the state substantiated nearly 17,500 reports of child abuse in 2018 alone. Mike Trautmann, The Courier-Journal, "From El Mencho to Bevin's pardons: 10 Courier Journal investigations that defined 2019," 31 Dec. 2019 Ten of the 65 child victims had prior substantiated history of neglect or abuse with DCS. Elizabeth Depompei, Indianapolis Star, "Report: 65 Hoosier children died due to neglect or abuse in 2018," 31 Dec. 2019 This authority is substantiated musically through the use of a meter that is exclusively hers: 4/4. Amy Lorette Damron Kyle, Quartz, "The feminist reboot opera deserves," 20 Dec. 2019 Tolson said last week that some of the hazing allegations were substantiated but did not elaborate on what the allegations were. USA TODAY, "Rare yellow cardinal sighted, escaped goat caught, fossilized bear skull found: News from around our 50 states," 18 Oct. 2019 The allegations were later deemed substantiated, the lawsuit said. Morgan Cook, San Diego Union-Tribune, "Lawsuit: County child welfare discriminated, retaliated against foster parents," 4 Aug. 2019 On the other hand, if DCF doesn’t substantiate allegations of maltreatment, a teacher or other professional who works with children isn’t off the hook. Josh Kovner,, "DCF will interview teacher, parents and children as it investigates complaint against Avon magnet school teacher," 12 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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Time Traveler for substantiate

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The first known use of substantiate was in 1610

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Statistics for substantiate

Last Updated

10 Feb 2020

Cite this Entry

“Substantiate.” Dictionary, Merriam-Webster, Accessed 17 Feb. 2020.

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More Definitions for substantiate


How to pronounce substantiate (audio)

English Language Learners Definition of substantiate

formal : to prove the truth of (something)

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