noun
1.
a. : a tall timber tree ( Juglans nigra ) of eastern No. America that has hard strong heavy dark brown wood much used for furniture and implements and that bears oily edible roughly spherical nuts — see tree illustration
b. : the wood of this tree
c. : one of the nuts of this tree
2. : an aromatic timber tree ( Cryptocarya palmerstonii ) of Australia
3. : california black walnut