American English

Definition of chestnut noun from the Oxford Advanced American Dictionary

     

    chestnut

     noun
    noun
    NAmE//ˈtʃɛsnʌt//
     
     
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  1. 1(also chestnut tree) [countable] a large tree with spreading branches, that produces smooth brown nuts inside cases that are covered with spikes. There are several types of chestnut trees. see also horse chestnut
  2. 2[countable] a smooth brown nut of a chestnut tree, some types of which can be eaten roasted chestnuts The dessert was a rich mixture of chestnut purée and cream.
  3. 3 [uncountable] a deep reddish-brown color
  4. 4[countable] a horse of a reddish-brown color
  5. 5 old chestnut [countable] (informal) an old joke or story that has been told so many times that it is no longer amusing or interesting
See the Oxford Advanced Learner's Dictionary entry: chestnut