I. adjective 1. appropriate or suitable in the circumstances • the theme could not be more apt.
2. [ predic., with infinitive] — having a tendency to do something • he is apt to be swayed by irrational considerations.
3. quick to learn • she proved an apt pupil.
– origin late Middle English (in the sense ‘suited, appropriate’): from Latin aptus ‘fitted’, past participle of apere ‘fasten’.