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English definition of “flat”

flat

adverb     /flæt/ (flatter, flattest)
B2 in a horizontal or level position on a surface : She spread the cloth flat across the kitchen table .Straight, even and level
flat out using all your energy or effort : We've all been working flat out to finish the project on time .Energetic and livelyEffort and expending energyTrying and making an effort
in 5 minutes/30 seconds, etc flat in exactly and only 5 minutes , 30 seconds , etc : He showered and got dressed in 10 minutes flat.Accurate and exact
(Definition of flat adverb from the Cambridge Learner's Dictionary © Cambridge University Press)

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