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English definition of “idle”

idle

verb [I]     /ˈaɪ.dl̩/ (UK also tick over)
If an engine or machine idles, it runs slowly but does not move or do any work: He left the engine idling and ran into the shop.Mechanical engineeringThe engine and engine partsEngines and motors
(Definition of idle verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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