Real Dictionary

run out
phrasal verb: If something runs out, it becomes used up so that there is no more left.
phrasal verb: If you run out of something, you have no more of it left.
phrasal verb: When a legal document runs out, it stops being valid.

run out in American English
to come to an end; expire or become used up, exhausted, etc.
to terminate; expire

run out in British English
to exhaust (a supply of something) or (of a supply) to become exhausted
noun: dismissal of a batter by running him or her out

run-out in American English
noun: the act of evading a jump or jumping outside of the limiting markers