- 1[uncountable, countable] a decision to stop something that has already been arranged from happening; a statement that something will not happen We need at least 24 hours' notice of cancellation. a cancellation fee Heavy seas can cause cancellation of ferry services. Cancellations must be made in writing.
- 2[countable] something that has been canceled Are there any cancellations for this evening's performance? (= tickets that have been returned)
- 3 [uncountable] the fact of making something no longer valid the cancellation of the contract