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

Other Words from invalidate

invalidation \ (ˌ)in-​ˌva-​lə-​ˈdā-​shən How to pronounce invalidate (audio) \ noun
invalidator \ in-​ˈva-​lə-​ˌdā-​tər How to pronounce invalidate (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
Recent Examples on the Web Despite their deeply loving and trusting bond, Guercio and Purificato have faced criticism on social media - saying that people often try to invalidate their relationship by calling it a lie. ABC News, 23 July 2022 But in the coming weeks, the committee laid out, Pence would come under pressure from Trump to invalidate Biden’s win and find a way to keep the president in power. Mary Clare Jalonick, Eric Tucker And Kevin Freking, Anchorage Daily News, 17 June 2022 And to invalidate regulations even when (usually Democratic) presidents support them, movement conservatives have argued for narrowly interpreting the power Congress has given or may give to agencies. New York Times, 30 June 2022 The majority downplayed the impact of its decision in part by pointing to the possibility that state courts could invoke their own constitutions to invalidate partisan gerrymanders. Greg Stohr And Bloomberg, Fortune, 30 June 2022 Holmes believed that the country would be OK if the court lacked the power to invalidate a federal law; Brandeis viewed the states as laboratories of democracy and warned that the court should strive to avoid constitutional questions. Brad Snyder, CNN, 21 June 2022 That suit, which sought to invalidate as many as 1.5 million mail-in ballots, was dismissed by courts. CBS News, 11 June 2022 That ordinance spurred five lawsuits in federal and state courts seeking to invalidate the council’s decision, including one filed by Wolverine, which Utah joined with the plaintiffs. Brian Maffly, The Salt Lake Tribune, 6 June 2022 Peckarsky is seeking to invalidate the law requiring election officials to write poll list numbers on absentee ballots. Patrick Marley, Milwaukee Journal Sentinel, 19 Jan. 2022 See More

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.

First Known Use of invalidate

1649, in the meaning defined above

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Time Traveler for invalidate

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The first known use of invalidate was in 1649

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Last Updated

11 Aug 2022

Cite this Entry

“Invalidate.” Dictionary, Merriam-Webster, Accessed 19 Aug. 2022.

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More Definitions for invalidate


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.


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 invalidate (audio) \ noun

More from Merriam-Webster on invalidate

Nglish: Translation of invalidate for Spanish Speakers

Britannica English: Translation of invalidate for Arabic Speakers


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