verb
BAD : The meeting has been cancelled until next Thursday.
GOOD : The meeting has been postponed until next Thursday.
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cancel = arrange for a planned event not to take place after all: 'Five of their players were either ill or injured, and so the match had to be cancelled.'
postpone = arrange for a planned event to take place at a later time or date: 'We've decided to postpone the wedding until Steve has found a job.'