occasion in WordNet English dictionary

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

1. give occasion to
   occasion