'occasion' definitions:

Definition of 'occasion'

From: WordNet
noun
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" [syn: juncture, occasion]
noun
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" [syn: affair, occasion, social occasion, function, social function]
noun
Reason; "there was no occasion for complaint"
noun
The time of a particular event; "on the occasion of his 60th birthday"
noun
An opportunity to do something; "there was never an occasion for her to demonstrate her skill"
verb
Give occasion to

Synonyms of 'occasion'

From: Moby Thesaurus