- walnut - nut of any of various walnut trees having a wrinkled two-lobed seed with a hard shell
--1 is a kind of edible nut
--1 is a part of walnut, walnut tree
--1 has particulars: black walnut; English walnut- walnut - hard dark-brown wood of any of various walnut trees; used especially for furniture and paneling
--2 is a kind of wood
--2 is a substance of walnut, walnut tree- walnut, walnut tree - any of various trees of the genus Juglans
--3 is a kind of nut tree
--3 is a member of Juglans, genus Juglans
--3 has parts: walnut
--3 has substances: walnut
--3 has particulars: - walnut - hard dark-brown wood of any of various walnut trees; used especially for furniture and paneling