The fruit or nut of any tree of the genus Juglans; also, the tree, and its timber. The seven or eight known species are all natives of the north temperate zone.
- Any of several deciduous trees of the genus Juglans, having pinnately compound leaves and a round, sticky outer fruit wall that encloses a nutlike stone with an edible seed.
- The stone or the ridged or corrugated seed of such a tree.
- The hard, dark brown wood of any of these trees, used for gunstocks and in cabinetwork.