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English definition of “smoothly”

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smoothly

adverb uk   /ˈsmuːð.li/ us  
B2 easily and without interruption or difficulty: The road was blocked for two hours after the accident, but traffic is now flowing smoothly again. Lead is added to fuel to make car engines run more smoothly. The pregnancy's gone very smoothly so far. If all goes smoothly, we should arrive by nine o'clock.C2 without any sudden movements or changes: I drove through the gates, which closed smoothly behind me.
(Definition of smoothly from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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