invalidate

verb
in·​val·​i·​date | \ (ˌ)in-ˈva-lə-ˌdāt How to pronounce invalidate (audio) \
invalidated; invalidating; invalidates

Definition of invalidate

transitive verb

: to make invalid especially : to weaken or destroy the cogency of

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Other Words from invalidate

invalidation \ (ˌ)in-​ˌva-​lə-​ˈdā-​shən How to pronounce invalidation (audio) \ noun
invalidator \ in-​ˈva-​lə-​ˌdā-​tər How to pronounce invalidator (audio) \ noun

Choose the Right Synonym for invalidate

nullify, negate, annul, abrogate, invalidate mean to deprive of effective or continued existence. nullify implies counteracting completely the force, effectiveness, or value of something. a penalty nullified the touchdown negate implies the destruction or canceling out of each of two things by the other. the arguments negate each other annul suggests making ineffective or nonexistent often by legal or official action. the treaty annuls all previous agreements abrogate is like annul but more definitely implies a legal or official act. a law to abrogate trading privileges invalidate implies making something powerless or unacceptable by declaration of its logical or moral or legal unsoundness. the court invalidated the statute

Examples of invalidate in a Sentence

actions that will invalidate the contract The study invalidates earlier theories. factors that may invalidate the test results
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Recent Examples on the Web

The suit, filed Aug. 2, alleges the charter applicants committed fraud by misrepresenting the facts in the application and have asked the court to invalidate the commission’s approval. al, "Alabama charter school commission remade, here’s their track record so far," 26 Aug. 2019 Mayorga's lawsuit, which was refiled in federal court, asks the court to invalidate the 2010 agreement on the grounds that Ronaldo and his legal team took advantage of her fragile emotional state to coerce her into signing it. Emanuella Grinberg, CNN, "Cristiano Ronaldo admits paying $375,000 in 2010 to settle sexual assault claim," 19 Aug. 2019 As a result, Saugus has asked the state Land Court to invalidate the special permit Lynn granted the company to open a pot shop there. Felicia Gans, BostonGlobe.com, "Lynn marijuana company CEO ‘speechless’ after storefront vandalized with anti-Semitic, racist symbolism," 24 July 2019 The Justice Department has asked a federal appeals court to invalidate the law, which was dubbed Obamacare by its opponents, an effort some Republicans fear could haunt them on the campaign trail. Kristina Peterson, WSJ, "Trump Administration Renews Attempt to Topple Affordable Care Act," 26 Mar. 2019 That case asked the court to invalidate the patents protecting the new drug TAF. Melody Petersen, latimes.com, "Patients sue Gilead, saying drug company intentionally delayed safer HIV medicine," 9 May 2018 McDougal's lawsuit, which asks a judge to invalidate the contract, alleges that Trump's attorney, Michael Cohen, was secretly involved in her discussions with the tabloid's parent company, American Media, Inc. NBC News, "Former Playboy model says Trump tried to pay her after sex," 23 Mar. 2018 In a filing with the court late last week, Justice Department attorneys argued that perhaps the health law should be invalidated only in the GOP states that are suing, rather than all states. Julie Rovner, Scientific American, "Federal Appeals Court Takes Up Case That Threatens Affordable Care Act," 9 July 2019 In doing so, Judge Michael Toomin blasted State’s Attorney Kim Foxx’s handling of the prosecution, saying her botched decision to appoint her top deputy to prosecute Smollett after recusing herself invalidated the case from start to finish. Megan Crepeau, chicagotribune.com, "The bizarre Jussie Smollett case takes yet another strange twist," 21 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'invalidate.' 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 invalidate

1649, in the meaning defined above

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Statistics for invalidate

Last Updated

8 Sep 2019

Look-up Popularity

Time Traveler for invalidate

The first known use of invalidate was in 1649

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More Definitions for invalidate

invalidate

verb

English Language Learners Definition of invalidate

: to weaken or destroy the effect of (something)
: to show or prove (something) to be false or incorrect

invalidate

verb
in·​val·​i·​date | \ in-ˈva-lə-ˌdāt How to pronounce invalidate (audio) \
invalidated; invalidating

Kids Definition of invalidate

: to weaken or destroy the effect of The phony signature invalidated the contract.

invalidate

transitive verb
in·​val·​i·​date | \ in-ˈva-lə-ˌdāt How to pronounce invalidate (audio) \

Legal Definition of invalidate

: to make or declare invalid

Other Words from invalidate

invalidation \ in-​ˌva-​lə-​ˈdā-​shən How to pronounce invalidation (audio) \ noun

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