occasion occasion /əˈkeɪʒən/

noun

1. () An event that occurs at a critical time  ( juncture , occasion )
   an event that occurs at a critical time
    At such junctures he always had an impulse to leave
   at such junctures he always had an impulse to leave
    It was needed only on special occasions
   it was needed only on special occasions
   
2. () A vaguely specified social event  ( function , social function , social occasion , affair , occasion )
   a vaguely specified social event
    The party was quite an affair
   the party was quite an affair
    An occasion arranged to honor the president
   an occasion arranged to honor the president
    A seemingly endless round of social functions
   a seemingly endless round of social functions
   
3. () Reason  ( occasion )
   reason
    There was no occasion for complaint
   there was no occasion for complaint
   
4. An opportunity to do something  ( occasion )
   an opportunity to do something
    There was never an occasion for her to demonstrate her skill
   there was never an occasion for her to demonstrate her skill
   
5. The time of a particular event  ( occasion )
   the time of a particular event
    On the occasion of his 60th birthday
   on the occasion of his 60th birthday
   

verb

1. () Give occasion to  ( occasion )
   give occasion to