cancellation

/ˌkænsəˈleɪʃən/
noun
  1. The act of deciding that something that was planned or arranged will not happen.
    • Her last-minute cancellation left the team scrambling.
    • The cancellation of the flight caused chaos at the airport.
    • We got a full refund after the cancellation of the event.
  2. The act of marking a stamp, ticket, or document to show it has been used or is no longer valid.
    • Collectors look for rare cancellations on old envelopes.
    • The postmark serves as a cancellation on the stamp.
    • A cancellation mark on a ticket proves it was used.
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