- the edible nut of trees of the genus Juglans, of the North Temperate Zone.
- the tree itself.
- the wood of such a tree.
- the hickory nut.
- any of various fruits or trees resembling the walnut.
- a somewhat reddish shade of brown, as that of the heartwood of the black walnut tree.
- any juglandaceous deciduous tree of the genus Juglans, of America, SE Europe, and Asia, esp J. regia, which is native to W Asia but introduced elsewhere. They have aromatic leaves and flowers in catkins and are grown for their edible nuts and for their wood
- the nut of any of these trees, having a wrinkled two-lobed seed and a hard wrinkled shell
- the wood of any of these trees, used in making furniture, panelling, etc
- a light yellowish-brown colour
- made from the wood of a walnut tree
- of the colour walnut
