look sth up definition, meaning - what is look sth up in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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look sth up

phrasal verb with look uk   us   /lʊk/ verb
B1 to try to find a piece of information by looking in a book or on a computer: If you don't know what the word means, look it up in a dictionary.
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(Definition of look sth up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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