an area containing reserves of petroleum, esp one that is already being exploited
noun 1. an area in which there are large deposits of oil. oil field An area with reserves of recoverable petroleum, especially one with several oil-producing wells.
/ˈɔɪlˌfaɪəd/ adjective 1. (of central heating) using oil as fuel
/ˈɔɪlˌɡæs/ noun 1. a gaseous mixture of hydrocarbons used as a fuel, obtained by the destructive distillation of mineral oils
[oil-fish] /ˈɔɪlˌfɪʃ/ noun, plural oilfishes (especially collectively) oilfish. 1. a snake mackerel, Ruvettus pretiosus, commonly inhabiting deep, marine waters.