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English definition of “size sth/sb up”

size sth/sb up

verb [T] uk phrasal verb with size   /saɪz/ us  
to examine something or someone carefully and decide what you think about it or them: We must size up the situation before we decide what to do. The two cats walked in circles around each other, sizing each other up.Analysing and evaluatingAssessing and estimating value
(Definition of size sth/sb up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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