run away is a verb meaning "flee; take to one's heels; cut and run". It carries 2 recorded senses.
flee; take to one's heels; cut and run
“If you see this man, run!”
“The burglars escaped before the police showed up”
Definitions, synonyms and semantic relations for run away come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.