oil refinery oil refiner • oil-refining · · · Info · Definitions · Synonyms · Characters · · oil refinery · · Text Common · · Latin · · Scripts 12 · · Length 5 · · Syllables Definitions · · · (noun) a refinery for petroleum. Synonyms: oil refinery, petroleum refinery. · · Noun Definition 1 Synonyms · · · petroleum refinery · · Synonym 1 Characters · · space U+0020 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 y latin small letter y U+0079