1. invalidate - verb
· declare invalid; "The contract was annulled"; "void a plea"
Synonym(s): annul, quash, void, avoid, nullify
Hypernym(s): cancel, strike_down
Antonym(s): validate
2. invalidate - verb
· make invalid for use; "cancel cheques or tickets"
Synonym(s): cancel
3. invalidate - verb
· show to be invalid
Synonym(s): nullify
Hypernym(s): negate, contradict
Antonym(s): validate
4. invalidate - verb
· take away the legal force of or render ineffective; "invalidate a contract"
Hypernym(s): change, alter, modify
Antonym(s): validate
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