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English definition of “trough”

trough

noun [C] (LOW POINT)    /trɒf/ US  /trɑːf/
a low point in a regular series of high and low points : Investing small amounts regularly is a good way of smoothing out the peaks and troughs of the stock market .Higher and lower points of achievementSuccess and achievementsFailures specialized environment (in the study of weather patterns ) a long area of low air pressure between two areas of high air pressure : A trough of low pressure over hilly areas will bring heavy thunderstorms overnight .Describing bad weather
(Definition of trough noun (LOW POINT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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