American English

Definition of refine verb from the Oxford Advanced American Dictionary

      

    refine

     verb
    verb
    NAmE//rɪˈfaɪn//
     
    Verb Forms present simple I / you / we / they refine
     
    he / she / it refines
     
    past simple refined
     
    -ing form refining
     
     
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  1. 1refine something to make a substance pure by taking other substances out of it the process of refining oil/sugar
  2. 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.
See the Oxford Advanced Learner's Dictionary entry: refine