occasion

nouns

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
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, function, occasion, social function, social occasion
reason
"there was no occasion for complaint"
occasion
is a type of (narrower)
a rational motive for a belief or action
"the reason that war was declared"; "the grounds for their declaration"
ground, reason
the time of a particular event
"on the occasion of his 60th birthday"
occasion
is a type of (narrower)
a suitable moment
"it is time to go"
time
an opportunity to do something
"there was never an occasion for her to demonstrate her skill"
occasion
is a type of (narrower)
a possibility due to a favorable combination of circumstances
"the holiday gave us the opportunity to visit Washington"; "now is your chance"
chance, opportunity

verbs

give occasion to
occasion
is a type of (narrower)
give rise to; cause to happen or occur, not always intentionally
"cause a commotion"; "make a stir"; "cause an accident"
cause, do, make