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View synonyms for

invalidate

[ in-val-i-deyt ]

verb (used with object)

invalidated, invalidating.
  1. to render invalid; discredit.

    Synonyms: , , , ,

  2. to deprive of legal force or efficacy; nullify.


invalidate

/ ɪˈæɪˌɪ /

verb

  1. to render weak or ineffective, as an argument
  2. to take away the legal force or effectiveness of; annul, as a contract
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Derived Forms

  • ˌˈ岹پDz, noun
  • ˈˌ岹ٴǰ, noun
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Other Word Forms

  • ·i·岹tDz noun
  • ·i·岹tǰ noun
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Word History and Origins

Origin of invalidate1

First recorded in 1640–50; invalid 2 + -ate 1
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Example Sentences

Examples have not been reviewed.

Supreme Court had invalidated as unconstitutional a New York law requiring people to show “proper cause” for why they needed to carry a concealed firearm.

From

Not that this invalidates the use of animal models in neurology.

From

Mr Gentles says that ageing the rum before it is sold is of paramount importance, and that doing so outside of Jamaica invalidates the products authenticity and uniqueness.

From

Legal experts also told us that there is nothing in US law which would invalidate pardons signed by autopen.

From

“Under what authority, or according to what philosophy, can a government invalidate or discredit research that’s focusing on two-thirds of the population?”

From

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invalidinvalidism