To leave a partner or commitment suddenly and without prior warning.

Third-person singular simple present indicative form of run back

A sporting event where people run a certain distance to fundraise for charity rather than for competition.

Third-person singular simple present indicative form of run up

Third-person singular simple present indicative form of run through

Third-person singular simple present indicative form of run over

(idiomatic) A trial or practice before the real attempt.

(idiomatic) To go unchecked or without control; to be wild or excessive.

(automotive) To operate a vehicle that is low on fuel. / (idiomatic) By extension, to operate with few resources or little money.

(idiomatic) To be in a state of fearful alarm.