invalidate

verb
in·val·i·date | \ (ˌ)in-ˈva-lə-ˌdāt \
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 \ noun
invalidator \in-ˈva-lə-ˌdā-tər \ 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

Poland’s Supreme Court is the final point of appeals for all criminal and civil matters—and wields the power to invalidate election results. Drew Hinshaw, WSJ, "Poland Steps Up Supreme Court Purge," 13 July 2018 However, the court rejected a measure invalidating all ballots cast abroad and by Iraqis displaced by recent conflict. NBC News, "Iraq set for election recount amid fraud claims," 22 June 2018 However, the court rejected a measure invalidating all ballots cast abroad and by Iraqis displaced by recent conflict. Washington Post, "Iraq set for election recount to salvage tainted result," 21 June 2018 However, the court rejected a measure invalidating all ballots cast abroad and by Iraqis displaced by recent conflict. Philip Issa, Fox News, "Iraq set for election recount to salvage tainted result," 21 June 2018 Linn is trying to overturn a Superior Court ruling last week that upheld Democratic Secretary of State Matt Dunlap’s decision to invalidate dozens of signatures filed by Linn. Globe Staff, BostonGlobe.com, "New England news in brief," 2 May 2018 The ruling cited recent decisions of the U.S. Supreme Court that had invalidated laws similar to Kentucky's IQ requirement. Caitlin Mcglade, The Courier-Journal, "Kentucky Supreme Court rules death penalty IQ law is unconstitutional," 14 June 2018 The Palestinians want east Jerusalem as the capital of their future state, and view the relocation of the embassy as a one-sided move that invalidates the U.S. as a Mideast peace broker. Aron Heller, chicagotribune.com, "Following U.S. lead, Guatemala moves embassy to Jerusalem," 16 May 2018 The Palestinians want east Jerusalem as the capital of their future state, and view the relocation of the embassy from Tel Aviv to the contested city as a one-sided move that invalidates the U.S. as a Mideast peace broker. NBC News, "U.S. delegation arrives in Jerusalem ahead of controversial embassy move," 13 May 2018

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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Last Updated

8 Sep 2018

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 \
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 \

Legal Definition of invalidate 

: to make or declare invalid

Other words from invalidate

invalidation \in-ˌva-lə-ˈdā-shən \ noun

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alleviating pain or harshness

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