/'wɔ:lnʌt; `wɔl,nʌt/ n
1 [C] nut containing an edible kernel with a wrinkled surface in a pair of boat-shaped shells 胡桃. =>illus at nut 见 nut 插图.
2 (a) [C] (also `walnut tree) tree on which this nut grows 胡桃树.
(b) [U] wood of this tree, used (esp as a veneer) in making furniture 胡桃木（用以制家具, 尤用作饰面）.

n

[Language: Old English;Origin: wealhhnutu, from Wealh 'Welsh person, foreigner' + hnutu 'nut'; because it was brought into Britain from abroad, probably by the Romans]
[C]
a nut that you can eat, shaped like a human brain
　coffee and walnut cake
[C]alsowalnut tree
a tree that produces this type of nut
[U]
the wood from a walnut tree, often used to make furniture