- 1refine something to make a substance pure by taking other substances out of it the process of refining oil/sugar
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- 2refine something to improve something by making small changes to it She has refined her playing technique over the years. This theory still needs a little refining.
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NAmE//rɪˈfaɪn//
Verb Forms present simple I / you / we / they refine he / she / it refines
past simple refined
-ing form refining
Check pronunciation: refine