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.
"pieces can be walnut."
"panellings can be walnut."
"finishes can be walnut."
"chairs can be walnut."
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