- a tree, Juglans nigra, of North America, having pinnate leaves and dark-brown bark and bearing an edible nut covered by a thick green or brown husk.
- the nut of this tree.
- the wood of this tree, valued in furniture-making.
- a North American walnut tree, Juglans nigra, with hard dark wood and edible oily nuts
- the valuable wood of this tree, used for cabinet work
- the nut of this tree
