Meaning of “refining” in the English Dictionary

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"refining" in Business English

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refiningnoun [ U ]

uk /rɪˈfaɪnɪŋ/ us PRODUCTION

the process of making different products from a basic product, usually oil or sugar:

oil/gas refining
Zambia is among the top five nations in terms of reserves, refining capacity, and production of copper.

(Definition of “refining” from the Cambridge Business English Dictionary © Cambridge University Press)