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English definition of “flat”

flat

adverb (COMPLETELY)    /flæt/ (flatter, flattest)
informal completely or to the greatest degree possible : She told him flat (US also flat out that she would not go to the show. Could you lend me some money , I'm flat broke (= I have no money ). → See also stony brokeComplete and wholeVery and extreme three minutes, half an hour, etc. flat informal exactly three minutes , half an hour , etc.: We managed to get to the station in five minutes flat.Accurate and exact flat out informal as fast or as hard as possible : My car only does about 60 mph , even when it's going flat out. We've been working flat out to get this done.Hurrying and doing things quicklyBusy and active
(Definition of flat adverb (COMPLETELY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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