drop‧out /ˈdrɒpaʊt $ ˈdrɑːp-/ noun [countable]

1. someone who leaves school or college before they have finished:
a high school dropout

2. someone who refuses to take part in ordinary society because they do not agree with its social practices, moral standards etc

[TahlilGaran] Dictionary of Contemporary English ▲

dropout
n. Someone who did not finish school, high school and college primarily.
Tim is having a hard time getting a better job as he was a high-school dropout.
Jack never got his B.A. as he became a college dropout.

[TahlilGaran] English Idioms Dictionary ▲