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English definition of “runaway”

runaway

adjective uk   /ˈrʌn.ə.weɪ/ us  
out of control or escaped from somewhere: A runaway bus/horse caused chaos on the streets. a runaway child sleeping on the streetsfigurative Her first novel's runaway success (= surprisingly big success) came as a great surprise.
runaway
noun [C] uk   us  
someone who has escaped from somewhere: We're searching for a couple of runaways from the young offenders' institution.
(Definition of runaway from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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