runaway

/ˈɹʌnəweɪ/

A person or animal that runs away or has run away; a person, animal, or organization that escapes captivity or restrictions.

Runaway children are vulnerable to criminal exploitation.

A vehicle (especially, a train) that is out of control.

(usually attributive) An object or process that is out of control or out of equilibrium.

The act of running away, especially of a horse or teams.

An overwhelming victory.

The home side won in a runaway.