Nouns

(n)chestnutwood of any of various chestnut trees of the genus Castanea
(n)chestnut, chestnut treeany of several attractive deciduous trees yellow-brown in autumn; yield a hard wood and edible nuts in a prickly bur
(n)chestnutedible nut of any of various chestnut trees of the genus Castanea
(n)chestnutthe brown color of chestnuts
(n)chestnuta small horny callus on the inner surface of a horse's leg
(n)chestnuta dark golden-brown or reddish-brown horse

Adjectives

(s)chestnut(of hair or feathers) of a golden brown to reddish brown color“a chestnut horse”, “chestnut hair”