To leave (school, a race, etc.) prematurely and voluntarily.
Used other than figuratively or idiomatically: see drop, out.
To be lost or momentarily interrupted.
To opt out of conventional society.
To declare publicly that one has made a vow, usually to show one's determination or to announce an act of retaliation.
To make a vow; to promise.
To make a vow regarding (something).
A solemn promise to perform some act, or behave in a specified manner, especially a promise to live and act in accordance with the rules of a religious order.
A declaration or assertion.