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English definition of “sum sth/sb up”

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sum sth/sb up

verb uk phrasal verb with sum   /sʌm/ (-mm-) us  
An action or object that sums something or someone up represents the most typical qualities of that person or thing: For me, her paintings sum up the restless spirit of America. to quickly form an opinion about someone or something: She summed up the situation quickly and took charge.
(Definition of sum sth/sb up phrasal verb, verb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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