Definition of refinement noun from the Oxford Advanced American Dictionary

      

    refinement

     noun
    noun
    NAmE//rɪˈfaɪnmənt//
     
     
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  1. 1[countable] a small change to something that improves it This particular model has a further refinement. all the refinements of modern technology
  2. 2[countable] refinement of something a thing that is an improvement on an earlier, similar thing The new plan is a refinement of the one before.
  3. 3[uncountable] the process of improving something or of making something pure the refinement of industrial techniques the refinement of uranium
  4. 4 [uncountable] the quality of being polite and well educated and able to judge the quality of things; the state of having the kind of manners that are considered typical of a high social class synonym gentility an atmosphere of refinement
See the Oxford Advanced Learner's Dictionary entry: refinement