A chaperone is someone who helps make sure everyone is safe and following the rules when people go out together.
Remember when you went to a birthday party and your parents or another grown-up came with you to watch over you and your friends to make sure nobody got hurt or did anything wrong? That grown-up was a chaperone!
Chaperones can go with you to school dances, field trips, and even on dates. They are there to keep an eye on things and make sure you are behaving appropriately. They can also help you with anything you need, like getting a snack or finding the bathroom.
Overall, a chaperone is like your personal guardian when you're out and about with a group of people.