verb
To make someone or something smarter or more intelligent
adverb
In a manner that makes someone or something smarter or more intelligent
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It is important to smarten up your appearance for the job interview.
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Hey, you need to smarten up if you want to impress your date.
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Dude, you seriously need to smarten up and stop making those silly mistakes.
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The company needs to smarten up its marketing strategy to stay competitive in the market.