runaway ( runaways plural )
1 adj You use runaway to describe a situation in which something increases or develops very quickly and cannot be controlled.
Our Grand Sale in June was a runaway success., ...a runaway best-seller.
2 n-count A runaway is someone, especially a child, who leaves home without telling anyone or without permission.
oft N n
...a teenage runaway.
3 adj A runaway vehicle or animal is moving forward quickly, and its driver or rider has lost control of it.
The runaway car careered into a bench, hitting an elderly couple...
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