convention vs meeting

convention and meeting both are nouns.

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

As nouns, meeting is a hypernym of convention; that is, meeting is a word with a broader meaning than convention:

Other hypernyms of convention include group meeting.

convention (noun)	meeting (noun)
the act of convening	the social act of assembling for some common purpose
orthodoxy as a consequence of being conventional	the act of joining together as one
something regarded as a normative example	a casual or unexpected convergence
(diplomacy) an international agreement	a formally arranged gathering
a large formal assembly	a small informal social gathering
	a place where things merge or flow together (especially rivers)