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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 in·val·i·date /(ˌ)ɪnˈvæləˌdet/
 (vt.)使無效

From: Webster's Revised Unabridged Dictionary (1913)

 In·val·i·date v. t. [imp. & p. p. Invalidated p. pr. & vb. n. Invalidating.]  To render invalid; to weaken or lessen the force of; to destroy the authority of; to render of no force or effect; to overthrow; as, to invalidate an agreement or argument.
 

From: WordNet (r) 2.0

 invalidate
      v 1: declare invalid; "The contract was annulled"; "void a plea"
           [syn: annul, quash, void, avoid, nullify]
           [ant: validate]
      2: of cheques or tickets [syn: cancel]
      3: show to be invalid [syn: nullify] [ant: validate]
      4: take away the legal force of or render ineffective;
         "invalidateas a contract" [syn: void, vitiate] [ant: validate]