occasion
noun /əˈkeɪʒn/
  /əˈkeɪʒn/
Idioms - [countable] a particular time when something happens
- on an occasion on this/that occasion
 - I've met him on several occasions.
 - They have been seen together on two separate occasions.
 - On one occasion, she called me in the middle of the night.
 - Only on rare occasions do I go out socially.
 - occasion when… I can remember very few occasions when he had to cancel because of ill health.
 - He used the occasion to announce further tax cuts.
 - I have stated on numerous occasions what options are open.
 - Harry has mentioned this on many previous occasions.
 
Extra Examples- I have stayed there on a number of occasions.
 - It was the first of many such occasions.
 - On this occasion, as it happens, the engine started immediately.
 - On this particular occasion, Joe wasn't there.
 - They came to visit us on the odd occasion, but only when they had nothing better to do.
 - I will overlook your lateness, on this occasion.
 
Oxford Collocations Dictionaryadjective- countless
 - many
 - multiple
 - …
 
- recall
 - remember
 
- on an/the occasion
 - on occasion
 - on occasions
 - …
 
- a number of occasions
 - on one occasion
 - on that occasion
 - …
 
 - [countable] a special event, ceremony or celebration
- a great/memorable/happy/momentous occasion
 - Turn every meal into a special occasion.
 - They marked the occasion (= celebrated it) with an open-air concert.
 - Their wedding turned out to be quite an occasion.
 - We expect you to dress for the occasion.
 - on the occasion of something He was presented with the watch on the occasion of his retirement.
 - Every good wish to them on the occasion of their 40th anniversary.
 
Wordfinder- anniversary
 - birthday
 - celebrate
 - commemorate
 - festivity
 - jubilee
 - occasion
 - parade
 - party
 - reception
 
Extra Examples- I only wear my silk dress on special occasions.
 - Medals are usually worn only on ceremonial occasions.
 - The Queen's coach is only used for state occasions.
 - We sell cards and notepaper for all occasions.
 - It was certainly a memorable occasion!
 
Oxford Collocations Dictionaryadjective- auspicious
 - big
 - great
 - …
 
- celebrate
 - mark
 - rise to
 - …
 
- call for something
 
- on occasion
 - occasion of
 
- for all occasions
 - for every occasion
 - a sense of occasion
 - …
 
 - [singular] a suitable time for something
- occasion for doing something It should have been an occasion for rejoicing, but she could not feel any real joy.
 - These workshops provide an occasion for talking about art.
 - occasion for something This is not a time for specifics, but an occasion for vision.
 - Festivals were occasions for great celebration.
 - I’ll speak to him about it if the occasion arises (= if I get a chance).
 
Oxford Collocations Dictionaryadjective- right
 - suitable
 
- get
 - have
 
- arise
 
- occasion for
 
- be an occasion for something
 - become an occasion for something
 - have occasion to do something
 - …
 
 - [uncountable, singular] (formal) a reason or cause
- occasion to do something I've had no occasion to visit him recently.
 - She doesn’t have much occasion to speak French in her new job.
 - occasion of something Her death was the occasion of mass riots.
 - occasion for something Art here is an occasion for education and entertainment.
 - I'm willing to go to court over this if the occasion arises (= if it becomes necessary).
 
Extra ExamplesTopics Change, cause and effectc2- I bought the camera last year, but never had the occasion to use it.
 - Last year we had occasion to visit relatives in Cornwall.
 
Oxford Collocations Dictionaryadjective- right
 - suitable
 
- get
 - have
 
- arise
 
- occasion for
 
- be an occasion for something
 - become an occasion for something
 - have occasion to do something
 - …
 
 
Word Originlate Middle English: from Latin occasio(n-) ‘juncture, reason’, from occidere ‘go down, set’, from ob- ‘towards’ + cadere ‘to fall’.
Idioms 
on occasion(s) 
- sometimes but not often
- He has been known on occasion to lose his temper.
 
 
a sense of occasion 
- a feeling or understanding that an event is important or special
- Candles on the table gave the evening a sense of occasion.