assembly vs meeting

assembly and meeting both are nouns.

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

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

assembly (noun)	meeting (noun)
the social act of assembling	the social act of assembling for some common purpose
the act of constructing something (as a piece of machinery)	the act of joining together as one
a group of machine parts that fit together to form a self-contained unit	a casual or unexpected convergence
a public facility to meet for open discussion	a formally arranged gathering
a unit consisting of components that have been fitted together	a small informal social gathering
a group of persons who are gathered together for a common purpose	a place where things merge or flow together (especially rivers)