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cancel +‎ -ation



cancellation (countable and uncountable, plural cancellations)

  1. The act, process, or result of cancelling; as, the cancellation of certain words in a contract, or of the contract itself.
  2. (mathematics) The operation of striking out common factors, in both the dividend and divisor.
  3. (philately) A postmark that marks a postage stamp so as to prevent its reuse.
  4. (law) In United States intellectual property law, a proceeding in which an interested party seeks to cancel the registration of a trademark or patent.
  5. (anatomy) The property of being cancellate.
    • 194?, Columbia University. School of Dental and Oral Surgery, Principles of Radiodontia
      Spongy bone is composed of cancellated areas appearing as a fine, interlacing network. These cancellated spaces are irregular both in size and shape. The normal cancellation is rather large []

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