Apt (adjective)
Suitable; appropriate; fit or fitted; suited.
“Tonight there’s a full moon, which is apt, since the election night will bring out the lunatics.”
Apt (adjective)
Having a habitual tendency; habitually liable or likely; disposed towards.
Apt (adjective)
Ready; especially fitted or qualified (to do something); quick to learn; prompt; expert
“a pupil apt to learn”
“an apt scholar”
Apt (noun)
An apartment; a flat
Appt (noun)
abbreviation of appointment
Wiktionary