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 Supreme Court handed Virginia Democrats a victory in a case of racial gerrymandering with a ruling upholding a lower court’s decision to invalidate the state’s redistricting plan. Dylan Bouscher, The Mercury News, "Political Cartoons: World news weekly roundup," 21 June 2019 The losing candidate Prabowo Subianto claims there was massive electoral fraud and is asking the Constitutional Court to invalidate the election. Fox News, "Security bolstered as challenge to Indonesia vote begins," 14 June 2019 The lawsuit seeks to invalidate Orozco’s contract, force him to forfeit the position, and require him to repay the salary he was unlawfully paid. Lex Talamo, The Seattle Times, "Washington attorney general accuses Wapato city official of enriching himself by creating and accepting $95,000 job," 10 June 2019 The simplest and most likely option is for Congress to pass a resolution of disapproval to invalidate the emergency Trump uses to justify the tariffs, according both a Democratic and a Republican aide. Mark Niquette, Fortune, "Trump's Mexico Tariffs Are Coming: Why It's So Hard to Stop Them," 7 June 2019 What Trump -- and Giuliani -- are clearly hoping to do is invalidate whatever Mueller finds out in the eyes of the President's base. Chris Cillizza, CNN, "Donald Trump wants you to know he can pardon himself. But he's not going to -- yet.," 4 June 2018 Let’s not do a preemptive strike in invalidating the will of the voters. David Garrick, San Diego Union-Tribune, "San Diego gives up legal fight to preserve Proposition B pension cuts," 10 June 2019 The Justice Department this week reversed itself to support a decision by a federal judge in Texas invalidating the Affordable Care Act. The Editorial Board, WSJ, "A Losing Health-Care Strategy," 27 Mar. 2019 The late Friday ruling invalidates an executive order Mr. Trump issued during... Timothy Puko, WSJ, "Court Blocks Trump Effort to Open Arctic Waters to Oil Drilling," 30 Mar. 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

14 Jul 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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Comments on invalidate

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