Verb: invalidate in'va-li,deyt
- Declare invalid
"The court invalidated the contract";
- annul, quash, void, avoid, nullify
- Take away the legal force of or render ineffective
"invalidate a contract";
- void, vitiate
- Make invalid for use
"invalidate cheques or tickets";
- cancel
Derived forms: invalidates, invalidated, invalidating
Type of: alter, cancel, change, contradict, mark, modify, negate, score, strike down
Antonym: validate