noun 1.any of the several deciduous trees constituting the genus
Castanea, of the beech family, having toothed, oblong leaves and bearing edible nuts enclosed in a prickly bur, and including
C. dentata (American chestnut), which has been virtually destroyed by the
chestnut blight, C. sativa (European chestnut), C. mollissima (Chinese chestnut), and
C. crenata (Japanese chestnut). 2.the edible nut of such a tree.
3.the wood of any of these trees.
EXPAND6.an old or stale joke, anecdote, etc.
7.the callosity on the inner side of the leg of a horse.
8.a reddish-brown horse having the mane and tail of the same color.
Compare bay5 (def. 2). COLLAPSE adjective 11.(of food) containing or made with chestnuts: turkey with chestnut stuffing.
Idiom12.pull someone's chestnuts out of the fire, to rescue someone from a difficulty.