Synonyms: vitiate, void, invalidate
Definition: take away the legal force of or render ineffective
Usage: invalidate a contract
Similar words: alter, change, modify
Definition: cause to change; make different; cause a transformation
Usage: The advent of the automobile may have altered the growth pattern of the city; The discussion has changed my thinking about the issue
Synonyms: nullify, invalidate
Definition: show to be invalid
Similar words: contradict, negate
Definition: prove negative; show to be false
Synonyms: invalidate, cancel
Definition: make invalid for use
Usage: cancel cheques or tickets
Synonyms: void, avoid, annul, invalidate, nullify, quash
Definition: declare invalid
Usage: The contract was annulled; void a plea
Similar words: strike down, cancel
Definition: declare null and void; make ineffective
Usage: Cancel the election results; strike down a law