let up Definition in the Cambridge English Dictionary
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Definition of “let up” - English Dictionary

Definition of "let up" - American English Dictionary

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let up

phrasal verb with let  us   /let/ verb [T]
(esp. of something ​unpleasant) to ​become less ​strong or ​stop: When the ​rain lets up we’ll go for a ​walk.
(Definition of let up from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "let up" - British English Dictionary

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let up

informal
phrasal verb with let uk   us   /let/ verb (present participle letting, past tense and past participle let)

let up (IMPROVE)

If ​badweather or an ​unpleasantsituationlets up, it ​stops or ​improves: When the ​rainlets up we'll go for a ​walk.

let up (STOP)

to ​stop doing something that you have been doing ​continuously or in a ​determined way: Neil ​spent the ​entireeveningmoaning about his ​job - he just wouldn't ​let up. The ​policeinsist that they are not ​letting up ontheircampaign against ​drugs.

let-upnoun [C usually singular]

uk   /ˈlet.ʌp/  us   /ˈlet̬-/ informal
a ​pause or ​reduction in something, usually something ​bad: The ​airlineauthorities are not ​expecting a let-up indelays (= are not ​expectingdelays to ​stop) for the ​rest of the ​summer.
(Definition of let up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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