Definitions
1.nounA 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."
2.nounA vehicle (especially, a train) that is out of control.
3.noun(usually attributive) An object or process that is out of control or out of equilibrium.
4.nounThe act of running away, especially of a horse or teams.
5.nounAn overwhelming victory."The home side won in a runaway."