Used other than figuratively or idiomatically: see drop, out.
To leave (school, a race, etc.) prematurely and voluntarily.
To be lost or momentarily interrupted.
To opt out of conventional society.
To yield (something) to another, as when defeated.
To win a fight against (an opponent) by submission.
To enter or put forward for approval, consideration, marking etc.
To yield or give way to another.
To subject; to put through a process.