What is the meaning of occasion?

noun

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

verb

• Give occasion to. .