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

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smarten (sb/sth) up

mainly UK
verb uk phrasal verb with smarten   /ˈsmɑː.tən/ us    /ˈsmɑːr-/
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.
(Definition of smarten (sb/sth) up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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