Synonyms for invalidate

Verb

1. invalidate, annul, quash, void, avoid, nullify, cancel, strike down

usage: declare invalid; "The contract was annulled"; "void a plea"

2. cancel, invalidate, score, mark

usage: of cheques or tickets

3. invalidate, nullify, negate, contradict

usage: show to be invalid

4. invalidate, void, vitiate, change, alter, modify

usage: take away the legal force of or render ineffective; "invalidateas a contract"