Definitions for: Invalidate


[v] take away the legal force of or render ineffective; "invalidateas a contract"
[v] show to be invalid
[v] of cheques or tickets
[v] declare invalid; "The contract was annulled"; "avoid a plea"



Webster (1913) Definition: In*val"i*date, v. t. [imp. & p. p. Invalidated;
p. pr. & vb. n. Invalidating.] [From Invalid null.]
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 invalidate an agreement or argument.

Synonyms: annul, avoid, cancel, nullify, nullify, quash, vitiate, void, void

Antonyms: formalise, formalize, validate, validate, validate

See Also: alter, break, cancel, change, contradict, mark, negate, score, stet, strike down

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