"walnut" in the noun sense
1. walnut
nut of any of various walnut trees having a wrinkled two-lobed seed with a hard shell
2. walnut
hard dark-brown wood of any of various walnut trees used especially for furniture and paneling
3. walnut, walnut tree
any of various trees of the genus Juglans
Source: WordNet® (An amazing lexical database of English)
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