sports meeting vs athletics

sports meeting and athletics both are nouns.

Word	Noun	Adjective	Verb	Adverb
sports meeting	Yes	No	No	No
athletics	Yes	No	No	No

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

Other hypernyms of sports meeting include athletic competition, athletic contest.

sports meeting (noun)	athletics (noun)
a meeting at which a number of athletic contests are held	an active diversion requiring physical exertion and competition
	participation in sports events as an extracurricular activity
	a contest between athletes