A fruit consisting of a hard or tough shell around an edible kernel.

“I love adding a few crushed nuts to my morning yogurt.”

A small flat piece of metal with a threaded hole that is screwed onto a bolt.

“He tightened the nut with a wrench to stop the chair from wobbling.”

A person who is very enthusiastic about a particular subject or activity.

“My brother is a total fitness nut; he spends hours at the gym every day.”