American Dictionary

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Definition smarten in American English

smarten verb

verb
/ˈsmɑrt(ə)n/
1

to stop yourself from making bad decisions

Example

It's time you smartened up.

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2

to improve the appearance of something, for example by cleaning or painting it

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3

if you smarten up or smarten yourself up, you make yourself look neat and clean

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Definition smarten in American English