noun chest·nut \ˈches(t)-(ˌ)nət\

: a type of tree that produces large, sweet nuts that can be eaten

: the nut of a chestnut tree

: the wood of a chestnut tree

Full Definition of CHESTNUT

a :  any of a genus (Castanea) of trees or shrubs of the beech family; especially :  an American tree (C. dentata) that was formerly a dominant or codominant member of many deciduous forests of the eastern United States but has now been largely eliminated by the chestnut blight and seldom grows beyond the shrub or sapling stage
b :  the edible nut of a chestnut
c :  the wood of a chestnut
:  a grayish to reddish brown
:  a chestnut-colored animal; specifically :  a horse having a body color of any shade of pure or reddish brown with mane, tail, and points of the same or a lighter shade — compare 2bay 1, 1sorrel 1
:  a callosity on the inner side of the leg of the horse — see horse illustration
a :  an old joke or story
b :  something (as a musical piece or a saying) repeated to the point of staleness

Examples of CHESTNUT

  1. <an op-ed piece that's offers nothing but warmed-over chestnuts for solving the city's financial woes>

Origin of CHESTNUT

Middle English chasteine, chesten chestnut tree, from Anglo-French chastein, chestain, from Latin castanea, from Greek kastanea
First Known Use: 14th century

Other Seed Plant Terms

aubergine, box, bramble, briar, composite, perpetual, pulse, trefoil



: of a reddish-brown color

Full Definition of CHESTNUT

:  of the color chestnut
:  of, relating to, or resembling a chestnut

First Known Use of CHESTNUT


Other Color Terms

argentine, cerise, cerulean, cyan, ocher, perse, puce, taupe, vermilion
CHESTNUT Defined for Kids


noun chest·nut \ˈches-ˌnət\

Definition of CHESTNUT for Kids

:  a sweet edible nut that grows in burs on a tree related to the beech
:  a reddish brown
Medical Dictionary


noun chest·nut \ˈches-(ˌ)nət\

Medical Definition of CHESTNUT

a :  a tree or shrub of the genus Castanea (C. dentata) that is found in eastern North America and the leaf of which was formerly used to prepare an infusion for the treatment of whooping cough b :  the edible nut of a chestnut
:  a callosity on the inner side of the leg of the horse
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