a particular time, esp. when certain events or circumstances take place:[countable] On several occasions he was seen leaving the spy's apartment. a special or important time, event, ceremony, etc.:[countable] The party was quite an occasion.
- a particular time, esp. as marked by certain circumstances or occurrences. 2. a special or important time, event, ceremony, etc.: The party was quite an occasion. 3. a convenient or favorable time; opportunity: a good occasion to take inventory.