Roan a.
1. Having a bay, chestnut, brown, or black color, with gray or white thickly interspersed; -- said of a horse.
Give my roan a drench. --Shak.
2. Made of the leather called roan; as, roan binding.
Roan antelope Zool., a very large South African antelope (Hippotragus equinus). It has long sharp horns and a stiff bright brown mane. Called also mahnya, equine antelope, and bastard gemsbok.