2 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Invalidate \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.
From WordNet r 1.6 [wn]:
invalidate
v 1: declare invalid; "The contract was annulled"; "avoid a plea"
[syn: {annul}, {quash}, {void}, {avoid}, {nullify}]
[ant: {validate}]
2: of cheques or tickets [syn: {cancel}]
3: show to be invalid [syn: {nullify}] [ant: {validate}]
4: take away the legal force of or render ineffective;
"invalidateas a contract" [syn: {void}, {vitiate}] [ant: {validate}]
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