n. (pl. -ies) 1 a the juices exuding from meat during and after cooking. b a dressing or sauce for food, made from these or from other materials, e.g. stock. 2 sl. unearned or unexpected money. gravy-boat a boat-shaped vessel for serving gravy. gravy train sl. a source of easy financial benefit.
[ ME, perh. from a misreading as gravé of OF grané, prob. f. grain spice: see GRAIN ]