chestnut
n. countablen. a small, round nut that grows on chestnut trees. You can eat it raw or cook it, often in autumn dishes.
n. the edible seed of the chestnut tree, typically enclosed in a spiny husk. Commonly used in cooking and confectionery.
We roasted chestnuts by the fire.
The chef added sweet chestnuts to the winter stew for extra flavor.
In many European traditions, roasted chestnuts are a staple street food during the cold winter months.
The noun is a contraction of chest(en) (“(obsolete) chestnut tree; fruit of this tree, chestnut”) + nut. Chesten is a late variant of chesteine (obsolete), from Middle English chesten, chesteine, chasteine, chesteyne (“chestnut tree (Castanea sativa); fruit of this tree; wood of this tree”), from Old French chastaigne, chastaine (French châtaigne), from Latin castanea (“chestnut tree; fruit of this tree”) (whence Old English ċisten), from Ancient Greek κᾰστᾰ́νειᾰ (kăstắneiă), a variant of κᾰ́στᾰνᾰ (kắstănă, “sweet chestnut”); for further etymology, see that entry. Doublet of castanet. Noun sense 4 (“joke, phrase, etc., which has been repeated so often as to have grown ineffective or tiresome”) may refer to an 1816 play, The Broken Sword, by William Dimond (1781 – c. 1837), in which one character begins to relate a story in which a boy slips down from a cork tree, and another interrupts him to say that he had previously repeated the story many times, and always mentioned a chestnut tree. The adjective is probably from an attributive use of the noun; compare French (of hair) châtain (“chestnut”) (from châtaigne (“a chestnut”)) and marron (“brown”) (from marron (“a horse chestnut or chestnut”)).