Definitions
1.NounThe act, process, or result of cancelling; as, the cancellation of certain words in a contract, or of the contract itself.
2.NounThe operation of striking out common factors, e.g. in both the dividend and divisor.
3.NounA postmark that marks a postage stamp so as to prevent its reuse.
4.NounIn United States intellectual property law, a proceeding in which an interested party seeks to cancel the registration of a trademark or patent.
5.NounThe property of being cancellate.