| cancellation | |
| 1. n. The act, process, or result of cancelling; as, the cancellation of certain words in a contract, or of the contract itself. | |
| 2. n. (mathematics) The operation of striking out common factors, in both the dividend and divisor. | |
| 3. n. (philately) A postmark that marks a postage stamp so as to prevent its reuse. | |
| 4. n. (legal) In United States intellectual property law, a proceeding in which an interested party seeks to cancel the registration of a trademark or patent. | |
| 5. n. (anatomy) The property of being cancellate. | |
