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

For a few years in the 1880s, the mines of this company produced vast quantities of gold and its success did much to invalidate the mountain’s supernatural myths. Advertorial, Orange County Register, "History & Heritage: Tipping Our Hat to the Wildest Ride in the Wilderness," 15 Sep. 2019 Roger Senserrich, the communications director of the Working Families, said the party is exploring whether some signature were improperly invalidated. Mark Pazniokas, courant.com, "Moore not conceding to Ganim without reviewing options after Bridgeport primary loss," 11 Sep. 2019 If the ruling is not reversed, the law would be invalidated and the $55 billion in federal subsidies and tax credits that keep plans affordable for low-income policyholders would likely disappear, Baumgarten said. Ron Hurtibise, sun-sentinel.com, "Two new Obamacare insurers proposed for Florida in 2020," 19 Aug. 2019 The panel invalidated related first-class mail rate adjustments too. Los Angeles Times, "Forever stamps’ 5-cent price jump is struck down by appeals court," 13 Sep. 2019 State officials invalidated last November’s election following allegations of voter fraud by a GOP operative. BostonGlobe.com, "WASHINGTON — President Trump’s rally in North Carolina will serve as a measure of his clout in trying to elect a Republican to the House in a closely watched special election that’s seen as a tossup race.," 10 Sep. 2019 The court overturned a lower court ruling that had invalidated the conviction. Phil Davis, baltimoresun.com, "Maryland Attorney General wants more drug dealers charged with manslaughter after some fatal overdoses," 16 Aug. 2019 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

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

7 Oct 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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