walnut

noun

1. the edible nut of trees of the genus Juglans, of the North Temperate Zone.Compare walnut family.
2. the tree itself.
3. the wood of such a tree.
4. Northeastern U.S. the hickory nut.
5. any of various fruits or trees resembling the walnut.
6. a somewhat reddish shade of brown, as that of the heartwood of the black walnut tree.