invalidate
1.
(
verb
) take away the legal force of or render ineffective; "invalidateas a contract"
Synonyms:
vitiate
,
void
Related Words:
alter
,
change
Antonyms:
validate
2.
(
verb
) show to be invalid
Synonyms:
nullify
Related Words:
contradict
,
negate
Antonyms:
validate
3.
(
verb
) declare invalid; "The contract was annulled"; "avoid a plea"
Synonyms:
annul
,
avoid
,
nullify
,
quash
,
void
Related Words:
break
,
cancel
Antonyms:
validate
4.
(
verb
) of cheques or tickets
Synonyms:
cancel
Related Words:
mark
,
score
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