'Redhead' definitions:

Definition of 'redhead'

noun

Someone who has red hair [syn: redhead, redheader, red-header, carrottop]

noun

North American diving duck with a grey-and-black body and reddish-brown head [syn: redhead, Aythya americana]

noun

Black-and-white North American woodpecker having a red head and neck [syn: redheaded woodpecker, redhead, Melanerpes erythrocephalus]

From: GCIDE

Redhead \Red"head`\ (-h?d`), n.
1. A person having red hair. [1913 Webster]
2. (Zool.) (a) An American duck (Aythya Americana) highly esteemed as a game bird. It is closely allied to the canvasback, but is smaller and its head brighter red. Called also red-headed duck. American poachard, grayback, and fall duck. See Illust. under Poachard. (b) The red-headed woodpecker. See Woodpecker. [1913 Webster]
3. (Bot.) A kind of milkweed (Asclepias Curassavica) with red flowers. It is used in medicine. [1913 Webster]