invalidate[verb]Synonyms: nullify, annul, cancel, overthrow, undermine, undo
Antonyms: validate
Related Words: counteract,
counterbalance,
negative,
neutralize,
offset,
discredit [TahlilGaran] English Synonym Dictionary ▲
in‧val‧i‧date AC /ɪnˈvælədeɪt, ɪnˈvælɪdeɪt/
verb [transitive] [
Word Family: verb:
validate ≠
invalidate;
noun:
validity ≠
invalidity;
adjective:
valid ≠
invalid]
1. to make a document, ticket, claim etc no longer legally or officially acceptable:
Failure to disclose all relevant changes may invalidate your policy.2. to show that something such as a belief or explanation is wrong:
Later findings invalidated the theory. [TahlilGaran] Dictionary of Contemporary English ▲