Found 2 items, similar to invalidate.
English → English (WordNet) Definition: invalidate 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]
English → English (gcide) Definition: Invalidate Invalidate \In*val"i*date\, 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. [1913 Webster]