- chestnut [ches′nut΄, chest′nut΄]n.[< chesten-nut < ME chesteine < OFr chastaigne < L castanea < Gr kastaneia]1. the smooth-shelled, sweet, edible nut of any of a genus (Castanea) of trees of the beech family2. the tree that it grows on3. the wood of this tree4. HORSE CHESTNUT5. reddish brown6. a reddish-brown horse7. the hard callus on the inner side of a horse's leg☆ 8. Informala) an old, stale joke or phrase; clichéb) a very familiar story, piece of music, etc. that is too often repeatedadj.reddish-brown——————pull someone's chestnuts out of the fire[cf. CAT'S-PAW] to do a dangerous, hard, or unpleasant thing for someone else
English World dictionary. V. Neufeldt. 2014.