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⇱ invalidation - WordReference.com Dictionary of English

invalidation

US:USA pronunciation: IPAUSA pronunciation: IPA/ɪnˌvælɪˈdeɪʃən/


WordReference Random House Learner's Dictionary of American English © 2026
in•val•i•date /ɪnˈvælɪˌdeɪt/USA pronunciation   v. [~ + object], -dat•ed, -dat•ing. 
  1. to discredit; show that (something) is incorrect:This new finding invalidates his previous argument.
  2. to deprive of legal force;
    nullify:The judge invalidated the guilty verdict and set the defendant free.
in•val•i•da•tion /ɪnˌvælɪˈdeɪʃən/USA pronunciation  n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2026
in•val•i•date  (in val′i dāt′),USA pronunciation v.t., -dat•ed, -dat•ing. 
  1. to render invalid;
    discredit.
  2. to deprive of legal force or efficacy;
    nullify.
  • invalid2 + -ate1 1640–50
in•val′i•da′tion, n. 
in•val′i•da′tor, n. 
    1. weaken, impair; disprove, refute, rebut.
'invalidation' also found in these entries (note: many are not synonyms or translations):
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