English dictionary

invalidate

/I/n'v/&/l/I/,d/eI/t/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

verb

declare invalid

verb.social

Synonyms annul avoid nullify quash void

Antonyms formalise formalize validate

Source: WordNet 3.0
make invalid for use

verb.communication

Synonyms cancel

Source: WordNet 3.0
show to be invalid

verb.cognition

Synonyms nullify

Source: WordNet 3.0
take away the legal force of or render ineffective

verb.change

Examples
Invalidate a contract.

Synonyms vitiate void

Antonyms validate

Source: WordNet 3.0
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 <i>invalidate</i> an agreement or argument.

verb

Source: webster1913