Definition of "walnut"

walnut

/ˈwɔːlnʌt/

noun
countable and uncountable, plural walnuts
1. A hardwood tree of the genus Juglans.
2. A nut of the walnut tree.
3. Wood of the walnut tree.
4. Dark brown colour, the colour of walnut wood.
adjective
not comparable
1. Having a dark brown colour, the colour of walnut wood.