A peanut is a small nut that grows underground and has a rich flavor. It's often eaten as a snack.
When people talk about peanuts, they usually mean the food itself, but sometimes they also refer to a specific machine used for testing athletic ability or endurance. For example, you might hear about someone running a marathon on a treadmill in a peanut, which would be a test designed to measure how well their body can keep going under stress.
A legume resembling a nut, the fruit of the plant Arachis hypogaea, native to South America.
Example: He always liked eating peanuts along with tea before biscuits came into his life.
