run away

Short definition from Wiktionary

Verb

1. 1
   To flee by running.
2. 2
   To leave home, or other place of residence, usually unannounced, or to make good on a threat, with such action usually performed by a child or juvenile.
3. 3
   To become a runaway. (of a device or vehicle)

Noun

1. 1
   Alternative spelling of runaway.