refine - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “refine”

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refine

verb [T]  us   /rɪˈfɑɪn/
to make a substance pure by removing unwanted material: Sugar and oil are refined before use. To refine something also means to improve it by making small changes: We haven’t finished refining the plan yet.
(Definition of refine from the Cambridge Academic Content Dictionary © Cambridge University Press)
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