📒 a large tree with spreading branches that produces smooth brown nuts inside cases that are covered with spikes. There are several types of chestnut tree.
📒 a smooth brown nut of a chestnut tree, some types of which can be eaten
📒 a deep red-brown colour
📒 a horse of a red-brown colour
📒 an old joke or story that has been told so many times that it is no longer funny or interesting