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

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

The lawsuit, filed earlier this month in Los Angeles, provided no proof to substantiate the claims and no details on exactly when the calls were recorded. Michael Balsamo,, "Michael Cohen’s photo with Tom Arnold fuels Trump tape speculation," 22 June 2018 White House officials and first responders in Texas, including the U.S. Coast Guard, have not been able to document any cases that would substantiate Trump's assertion. Kevin Diaz, Houston Chronicle, "White House backs off Trump assertion of Harvey storm-watcher rescues," 8 June 2018 The suit provides no proof to substantiate the claims and no details on exactly when the calls were recorded., "Giuliani Says Stormy Daniels Has ‘No Reputation’," 8 June 2018 In practical terms, this means that Zervos’s lawsuit is alive and well and that her lawyers may now want to substantiate her claims by seeking discovery — the exchange of materials prior to trial that may even include a deposition of Trump himself. Cristian Farias, Daily Intelligencer, "The President of the United States Can Be Dragged Into Court for Defamation Case, Judge Rules," 20 Mar. 2018 Cramer did drive more than 2,300 miles according to an AP analysis, which mapped the locations to substantiate the mileage and also checked with event organizers and media reports to verify Kevin Cramer’s attendance. Washington Post, "AP FACT CHECK: Rep. Kevin Cramer did drive 2,300 miles," 3 July 2018 The law firm Gibson Dunn conducted an investigation and later determined that some of the allegations against Hornsey were substantiated, according to Reuters. Andrew J. Hawkins, The Verge, "Uber senior executive resigns after racial discrimination allegations," 11 July 2018 The headmaster found that Harrison had made the remarks but that the allegations about the drug use comments were not substantiated. Eli Rosenberg,, "Jury convicts Boston high school dean who led secret life, shot student in the head," 1 June 2018 Ad claims must be substantiated, NAD says T-Mobile also tried to sway the NAD by pointing to certain benefits of its unlimited plan, including a higher de-prioritization threshold. Jon Brodkin, Ars Technica, "T-Mobile should stop claiming it has “Best Unlimited Network,” ad group says," 21 May 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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Last Updated

8 Sep 2018

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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

: to prove the truth of (something)

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to make amends

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