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annul

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verb an·nul \ə-ˈnəl\

Simple Definition of annul

  • : to say officially that something is no longer valid : to make (something) legally void

Full Definition of annul

an·nulledan·nul·ling

  1. transitive verb
  2. 1 :  to reduce to nothing :  obliterate

  3. 2 :  to make ineffective or inoperative :  neutralize <annul the drug's effect>

  4. 3 :  to declare or make legally invalid or void <wants the marriage annulled>

Examples of annul

  1. <unfortunately, his arrogant attitude annuls the many generous favors he does for people>

  2. <plans to annul their short-lived, ill-advised marriage>



Origin of annul

Middle English annullen, from Anglo-French annuller, from Late Latin annullare, from Latin ad- + nullus not any — more at null


First Known Use: 15th century

Synonym Discussion of annul

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 annul



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