Pronunciation: (u-kā'zhun),[key] —n. 1. a particular time, esp. as marked by certain circumstances or occurrences: They met on three occasions. 2. a special or important time, event, ceremony, celebration, etc.: His birthday will be quite an occasion. 3. a convenient or favorable time, opportunity, or juncture: This slack period would be a good occasion to take inventory. 4. the immediate or incidental cause or reason for some action or result: What is the occasion for this uproar? 5. (in the philosophy of Alfred North Whitehead) the coincidence of the eternal objects forming a specific point-event.
6. occasions,Obs. a. needs or necessities.
b. necessary business matters: to go about one's lawful occasions. 7. on occasion, now and then; from time to time; occasionally: She visits New York on occasion.