Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

invalidate

play
verb in·val·i·date \(ˌ)in-ˈva-lə-ˌdāt\

Simple Definition of invalidate

  • : to weaken or destroy the effect of (something)

  • : to show or prove (something) to be false or incorrect

Source: Merriam-Webster's Learner's Dictionary

Full Definition of invalidate

  1. transitive verb
  2. :  to make invalid; especially :  to weaken or destroy the cogency of

invalidation play \-ˌva-lə-ˈdā-shən\ noun
invalidator play \in-ˈva-lə-ˌdā-tər\ noun

Examples of invalidate in a sentence

  1. actions that will invalidate the contract

  2. The study invalidates earlier theories.

  3. factors that may invalidate the test results



1649

First Known Use of invalidate

1649

Synonym Discussion of 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>.

Rhymes with invalidate

abbreviate, abominate, accelerate, accentuate, accommodate, acculturate, accumulate, adjudicate, adulterate, affiliate, agglomerate, alienate, alleviate, alliterate, amalgamate, ameliorate, amyl nitrate, annihilate, annunciate, anticipate, apostolate, appreciate, appropriate, approximate, arpeggiate, articulate, asphyxiate, assassinate, asseverate, assimilate, associate, at any rate, attenuate, authenticate, barbiturate, bicarbonate, calumniate, capacitate, capitulate, catholicate, certificate, coagulate, coelenterate, collaborate, commemorate, commiserate, communicate, compassionate, concatenate, conciliate, confabulate, confederate, conglomerate, congratulate, consolidate, contaminate, cooperate, coordinate, corroborate, deactivate, debilitate, decapitate, decelerate, decerebrate, deconcentrate, deconsecrate, decorticate, decrepitate, de-escalate, defibrinate, defoliate, degenerate, deliberate, delineate, demodulate, denominate, depopulate, depreciate, deracinate, deregulate, desegregate, desiderate, detoxicate, devaluate, diaconate, dilapidate, discriminate, disintegrate, disseminate, dissimulate, dissociate, domesticate, effectuate, ejaculate, elaborate, electroplate, eliminate, elucidate, emaciate, emancipate, emasculate, encapsulate, enumerate, enunciate, episcopate, equivocate, eradicate, etiolate, evacuate, evaluate, evaporate, eventuate, eviscerate, exacerbate, exaggerate, exasperate, excited state, excogitate, excoriate, exfoliate, exhilarate, exonerate, expatiate, expatriate, expectorate, expostulate, expropriate, extenuate, exterminate, extrapolate, facilitate, felicitate, fish or cut bait, garrison state, gesticulate, habilitate, habituate, hallucinate, humiliate, hydrogenate, hypothecate, illuminate, impersonate, inactivate, inaugurate, incarcerate, incinerate, incorporate, incriminate, indoctrinate, inebriate, infatuate, infuriate, ingratiate, ingurgitate, initiate, inoculate, inseminate, insinuate, instantiate, intercalate, interpolate, interrelate, interrogate, intimidate, intoxicate, investigate, invigorate, irradiate, Italianate, Korea Strait, lanceolate, legitimate, luxuriate, mandarinate, manipulate, matriarchate, matriculate, Merthiolate, necessitate, negotiate, noncandidate, obliterate, officiate, Orange Free State, orientate, originate, oxygenate, participate, particulate, patriarchate, patriciate, perambulate, peregrinate, perpetuate, pontificate, precipitate, predestinate, predominate, prefabricate, premeditate, preponderate, prevaricate, procrastinate, prognosticate, proliferate, propitiate, proportionate, quadruplicate, quintuplicate, reciprocate, recriminate, recuperate, redecorate, reduplicate, reeducate, refrigerate, regenerate, regurgitate, reincarnate, reintegrate, reiterate, rejuvenate, remunerate, repatriate, repudiate, resuscitate, retaliate, reticulate, revaluate, reverberate, scholasticate, second estate, self-flagellate, self-immolate, self-pollinate, seventy-eight, sextuplicate, Singapore Strait, sophisticate, subordinate, substantiate, syllabicate, tergiversate, transliterate, triangulate, vanity plate, variegate, vaticinate, vituperate, vociferate


INVALIDATE Defined for Kids

invalidate

play
verb in·val·i·date \in-ˈva-lə-ˌdāt\

Definition of invalidate for Students

invalidatedinvalidating

  1. :  to weaken or destroy the effect of <The phony signature invalidated the contract.>




Law Dictionary

invalidate

play
transitive verb in·val·i·date \in-ˈva-lə-ˌdāt\

Legal Definition of invalidate

  1. :  to make or declare invalid

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




Seen and Heard

What made you want to look up invalidate? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to dishevel or rumple

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

soothe disapprove reduce perplex
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ