Invalidate - Definition
invalidate
v 1: declare invalid; "The contract was annulled"; "void a plea"
[syn: invalidate, annul, quash, void, avoid,
nullify] [ant: formalise, formalize, validate]
2: make invalid for use; "cancel cheques or tickets" [syn:
cancel, invalidate]
3: show to be invalid [syn: invalidate, nullify] [ant:
validate]
4: take away the legal force of or render ineffective;
"invalidate a contract" [syn: invalidate, void,
vitiate] [ant: validate]