adj. Having a bay, chestnut, brown, or black color, with gray or white thickly interspersed; -- said of a horse.adj. Made of the leather called roan.n. The color of a roan horse; a roan color.n. A roan horse.n. A kind of leather used for slippers, bookbinding, etc., made from sheepskin, tanned with sumac and colored to imitate ungrained morocco.