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refinement
/rɪˈfaɪnmənt/ nounDefinition
› [U] PRODUCTION the process of making a substance pure: The refinement of raw opium yields other drugs, such as morphine.
› [C or U] a small change that improves something: These refinements have increased the machine's accuracy by 25%. Long-term cost reductions will be achieved through the refinement of operations.
(Definition of refinement noun from the Cambridge Business English Dictionary
© Cambridge University Press)
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