Definitions for walnutˈwɔlˌnʌt, -nət

Random House Webster's College Dictionary

wal•nutˈwɔlˌnʌt, -nət(n.)

the edible nut of trees of the genus Juglans, of the North Temperate Zone.
Category: Plants
the tree itself.
Category: Plants
the wood of this tree, used in making furniture.
Category: Furniture, Botany
a somewhat reddish shade of brown, as that of the heartwood of the black walnut tree.

Origin of walnut:

bef. 1050; ME; OE wealh-hnutu lit., foreign nut; see Welsh , nut

Princeton's WordNet

walnut(noun)
nut of any of various walnut trees having a wrinkled two-lobed seed with a hard shell
walnut(noun)
hard dark-brown wood of any of various walnut trees; used especially for furniture and paneling
walnut, walnut tree(noun)
any of various trees of the genus Juglans

Kernerman English Learner's Dictionary

walnut(noun)ˈwɔlˌnʌt, -nət
a brown nut with deep wrinkles

Wiktionary

walnut(Noun)
A hardwood tree of the genus Juglans.
walnut(Noun)
The nut of the walnut tree.
walnut(Noun)
The wood of the walnut tree.
walnut(Adjective)
(colour) Having a dark brown colour, the colour of walnut wood.

Origin: walhhnutu, from walhaz (whence Walloon, Welsh) + (whence nut). Cognate with Dutch walnoot, German Walnuss, Swedish valnöt. Compare more recent term Welsh onion, which also uses Welsh to mean “foreign”.

Webster Dictionary

Walnut(noun)
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