English Reference

Word

refining

Phoneticsre·fin·ing, stress on the second syllable

US/ɹəˈfaɪnɪŋ/

UK/ɹɪfˈaɪnɪŋ/

Definitions

01industrial purification

B2 · Upper Intermediate Uncountable noun Science Technical

n. the industrial process of cleaning a raw material, such as oil or sugar, to make it ready for use.

n. the industrial process of removing impurities from a raw substance, such as petroleum, metal, or sugar, to produce a finished product.

“The refining of crude oil into petrol takes place at large plants near the coast.”

“Environmental regulations have forced significant changes in the refining of precious metals to reduce toxic waste runoff.”

Usage

Often used as an uncountable noun in industrial contexts.

02improving an idea or skill

B2 · Upper Intermediate Uncountable noun

n. the act of making small changes to something to make it better or more exact.

n. the process of improving a theory, method, or skill by making fine adjustments or removing flaws.

“After months of refining, the new software was finally ready for the public.”

“The constant refining of his technique allowed the pianist to perform the difficult concerto with effortless precision.”

Usage

Frequently appears as a gerund acting as a noun.

Real-World Examples

“Oil production in the Gulf has recovered somewhat since the US went to war with Iran but diesel refining in the area has not, Dhar wrote.”
The Guardian 24 Aug 2026
“Most of that is oil which will be shipped to Europe for refining before being sold on the open market.”
BBC News 17 Aug 2026

Word family

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Frequent
Level
B2 · Upper Intermediate
Updated

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