meeting vs seance

meeting and seance both are nouns.

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

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

meeting (noun)	seance (noun)
the social act of assembling for some common purpose	a meeting of spiritualists
the act of joining together as one
a casual or unexpected convergence
a formally arranged gathering
a small informal social gathering
a place where things merge or flow together (especially rivers)