/ ˈwɔːlnʌt; NAmE / noun
1.
[ C ] the light brown nut of the walnut tree that has a rough surface and a hard round shell in two halves
2.
(also ˈwalnut tree ) [ C ] the tree on which walnuts grow
3.
[ U ] the brown wood of the walnut tree, used in making furniture
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WORD ORIGIN
late Old English walh-hnutu , from a Germanic compound meaning foreign nut.