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 substantiate (audio) \ noun
substantiative \ səb-​ˈstan(t)-​shē-​ˌā-​tiv How to pronounce substantiate (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 But given that an employer sets the terms of employment, that individual would need to request — and substantiate their need for — a reasonable accommodation under the law. Megan Cerullo, CBS News, "Can your employer force you to get a COVID-19 vaccine? Yes (usually)," 6 Dec. 2020 Six of the 11 complaints resulted in no consequences, either because managers couldn’t substantiate the allegations after reviewing the record or the issues raised were matters to be decided in the appeals process. Tal Kopan, San Francisco Chronicle, "Bad conduct, leering ‘jokes’ — immigration judges stay on bench," 22 Jan. 2021 There is, of course, no evidence to date to substantiate these widespread claims of voter fraud, with even establishment Republicans beginning to turn their backs on the Trump administration’s efforts to invalidate the election. Asia Ewart,, "Reminder: Trump Once Accused A Thanksgiving Turkey Of Refusing To Concede," 23 Nov. 2020 The Post criticized Trump for undermining the election results long after his legal team found nothing to substantiate widespread election fraud that would have tipped the scales in Biden's favor. David Goldman, CNN, "New York Post to Donald Trump: Stop the insanity," 28 Dec. 2020 The owners then provided free transportation and covered co-payments to further substantiate their fraudulent Medicare claims. Alison Medley, Chron, "Houston home healthcare owners charged for billing $10M in phony Medicare claims in kickback scheme," 16 Dec. 2020 President Trump's legal team has consistently made claims there was a national voter fraud conspiracy during the 2020 election but has not provided any evidence to substantiate that claim. Anthony Leonardi, Washington Examiner, "Former police captain charged with aggravated assault after conducting alleged 'civilian' voter fraud investigation," 15 Dec. 2020 Arnold’s piece offered no evidence to substantiate his assertions, and the Huffington Post later took the story down, though an archived version remains online. Russ Mitchell Staff Writer, Los Angeles Times, "Tesla called her a criminal. Her fight could be a milestone for employees’ rights," 8 Dec. 2020 There is no evidence to substantiate the claims made by Trump or Brooks, though the Trump campaign continues to file lawsuits claiming impropriety. Matthew Brown, USA TODAY, "Alabama Rep. Mo Brooks says he will challenge Electoral College results," 3 Dec. 2020

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 Time Traveler

The first known use of substantiate was in 1610

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Statistics for substantiate

Last Updated

28 Feb 2021

Cite this Entry

“Substantiate.” Dictionary, Merriam-Webster, Accessed 8 Mar. 2021.

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English Language Learners Definition of substantiate

formal : to prove the truth of (something)

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