occasion vs meeting

occasion and meeting both are nouns.

Word	Noun	Adjective	Verb	Adverb
occasion	Yes	No	Yes	No
meeting	Yes	No	No	No

As nouns, meeting is a hyponym of occasion; that is, meeting is a word with a more specific, narrower meaning than occasion:

occasion (noun)	meeting (noun)
an event that occurs at a critical time	the social act of assembling for some common purpose
a formal or official social gathering or ceremony of people	the act of joining together as one
a rational motive for a belief or action	a casual or unexpected convergence
an opportunity to do something	a formally arranged gathering
the time of a particular event	a small informal social gathering
	a place where things merge or flow together (especially rivers)

occasion (verb)	meeting (verb)
give occasion to