1540s, "one who flees," from verbal phrase, from run (v.) + away (adv.). Meaning "an act of running away" is from 1724.

A malfunctioning automatic firearm that fires multiple shots after trigger pressure is released..

A thermally unstable reaction system which exhibits an uncontrolled accelerating rate of reaction leading to rapid increases in temperature and pressure.

Runaway, Homeless, and Missing Children Protection Act is a U.S. Federal law that reauthorizes programs under the Runaway and Homeless Youth Act and the Missing Children’s Assistance Act.

A runaway is a minor who is reported missing because his\her whereabouts are unknown to the child's legal custodian, the circumstances of whose absence indicate that the child voluntarily left th [..]

(n) an easy victory(n) someone who flees from an uncongenial situation(adj) completely out of control

A person under 18 years of age who has left home without the permission of his/her parent(s) or legal guardian.

a part of the airfield for aircraft landing and take-off.

Means to stay away from your opponent keeping a large distance between you and them, this is usually done to timerscam them (time them out) so that the person with the most health wins but it can be also used to avoid certain attacks.