invalidate : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: invalidate	by the DICT Development Group
2 results for invalidate
From WordNet (r) 3.0 (2006) [wn]:
invalidate v declare invalid; "The contract was annulled"; "void a plea" Synonym(s): invalidate, annul, quash, void, avoid, nullify Antonym(s): formalise, formalize, validate make invalid for use; "cancel cheques or tickets" Synonym(s): cancel, invalidate show to be invalid Synonym(s): invalidate, nullify Antonym(s): validate take away the legal force of or render ineffective; "invalidate a contract" Synonym(s): invalidate, void, vitiate Antonym(s): validate
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Invalidate \Inval"idate\, v. t. [imp. & p. p. {Invalidated}; p. pr. & vb. n. {Invalidating}.] [From {Invalid} null.] 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.