What is the meaning of Drop_out?

To leave (school, a race, etc.) prematurely and voluntarily.

To opt out of conventional society.

To be lost or momentarily interrupted.

Used other than figuratively or idiomatically: see drop, out.

To give way under someone.

To cause someone to slip and/or fall down.

To dismiss, break up with or abandon (someone).

Source: wiktionary.org