I. chest ‧ nut 1 /ˈtʃesnʌt/ BrE AmE noun
[ Date: 1500-1600 ; Origin: chesten 'chestnut tree' (14-17 centuries) (from Old French chasteigne , from Latin castanea , from Greek kastanea ) + nut ]
1 . [countable] a smooth red-brown nut that you can eat:
roast chestnuts
2 . ( also chestnut tree ) [countable] the tree on which this nut grows
3 . [uncountable] a red-brown colour
4 . [countable] a horse that is red-brown in colour
5 . an old chestnut a joke or story that has been repeated many times
6 . [countable] a ↑ horse chestnut
⇨ ↑ water chestnut
II. chestnut 2 BrE AmE adjective
red-brown in colour:
her chestnut hair