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