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English definition of “sag”

sag

verb [I]     /sæɡ/ (-gg-)
to drop down to a lower level in the middle: The shelf sagged under the weight of the heavy books. a sagging roof/floor/bedHanging and suspending to become weaker: The dollar held up well this morning but the pound sagged.Becoming and making less strong
(Definition of sag verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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