/ Dictionary / Index O oilfish: Meaning and Definition of Find definitions for: oil•fish Pronunciation: (oil'fish"), [key] — pl. -fish•es, -fish. a snake mackerel, Ruvettus pretiosus, commonly inhabiting deep, marine waters. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oilfish (Thesaurus) oil field oil gilding Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language