Definition of moccasin

• n. - A shoe made of deerskin, or other soft leather, the sole and upper part being one piece. It is the customary shoe worn by the American Indians.
• n. - A poisonous snake of the Southern United States. The water moccasin (Ancistrodon piscivorus) is usually found in or near water. Above, it is olive brown, barred with black; beneath, it is brownish yellow, mottled with darker. The upland moccasin is Ancistrodon atrofuscus. They resemble rattlesnakes, but are without rattles.