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English definition of “smarten (sb/sth) up”

smarten (sb/sth) up

mainly UK phrasal verb with smarten     /ˈsmɑː.tən/ US  /ˈsmɑːr-/ verb
to (cause to) become more clean, tidy, and stylish: She's really smartened herself up since she left university. You'll have to smarten up if you want to work in television.Cleaning and tidying places and thingsSmart and elegantAttractive
(Definition of smarten (sb/sth) up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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