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

transitive verb

: to make invalid
especially : to weaken or destroy the cogency of
invalidation noun
invalidator 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 Judge Williams’ most pointed questions appeared to center around whether Davis’ legal argument would not only force the court to invalidate his death sentence, but also the underlying guilty verdict in his case. Jakob Rodgers, The Mercury News, 5 Apr. 2024 Twice now, courts have invalidated government attempts to ban TikTok. Daniel Lyons, TIME, 3 Apr. 2024 The campaign claims this is an attempt to invalidate the candidate. Oren Oppenheim, ABC News, 2 Apr. 2024 In 2012, the Court invalidated multiple provisions of a more modest Arizona law that gave local and state police the authority to ask for someone’s immigration papers. Jonathan Blitzer, The New Yorker, 31 Mar. 2024 When individuals are conditioned to believe harm—of any kind—inflicted upon them is an expression of love, their experiences are invalidated, furthering the cycle of shame and trauma. Mark Travers, Forbes, 27 Mar. 2024 Because all of her results from Dec. 25, 2021 were invalidated, Team USA moved up from second place in the 2022 Olympic team event to first place. Lawrence Yee, Peoplemag, 8 Mar. 2024 Military analysts are reportedly baffled by how the fundamentals of wartime principles have shifted as previous Russian, U.S. and NATO military doctrines have largely all been invalidated by the realities of drone warfare, explained the expert. Caitlin McFall, Fox News, 31 Mar. 2024 The district then filed a lawsuit against Disney in state court to invalidate the deal. Samantha Masunaga, Los Angeles Times, 27 Mar. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'invalidate.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1649, in the meaning defined above

Time Traveler
The first known use of invalidate was in 1649

Dictionary Entries Near invalidate

Cite this Entry

“Invalidate.” Dictionary, Merriam-Webster, Accessed 16 Apr. 2024.

Kids Definition


in·​val·​i·​date (ˈ)in-ˈval-ə-ˌdāt How to pronounce invalidate (audio)
: to weaken or destroy the effect of
evidence invalidating their claim
invalidation noun

Legal Definition


transitive verb
in·​val·​i·​date in-ˈva-lə-ˌdāt How to pronounce invalidate (audio)
: to make or declare invalid
invalidation noun

More from Merriam-Webster on invalidate

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