American English

Definition of walnut noun from the Oxford Advanced American Dictionary



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  1. 1[countable] the light brown nut of the walnut tree that has a rough surface and a hard round shell in two halves
  2. 2(also walnut tree) [countable] the tree on which walnuts grow
  3. 3[uncountable] the brown wood of the walnut tree, used in making furniture a walnut writing desk
See the Oxford Advanced Learner's Dictionary entry: walnut