Definitions for "Invalidate"
Keywords:  refute, discredit, degrade, deny, fact
invalidation (refuting or degrading or discrediting or denying something someone else considers to be fact).
refute, degrade, discredit or deny something someone else considers to be fact.
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.
take away the legal force of or render ineffective; "invalidateas a contract"
Keywords:  cheques, tickets
of cheques or tickets
Keywords:  plea, annulled, void, declare, contract
declare invalid; "The contract was annulled"; "void a plea"
show to be invalid