A scar is an area on your skin that's become permanently marked after healing from an injury.
When someone gets hurt, it can leave behind some kind of damage to their body. The healing process often leaves a mark or a raised bit, like a bump. That mark stays with them long after the injury itself has healed, and that's what we call a scar. Scars can be big or small, depending on how bad the wound was - for example, if you cut yourself really badly, the scar might look pretty ugly. But lots of people get scars from minor things too, like falling off their bike when they were kids or getting a burn when cooking dinner.
A permanent mark on the skin, sometimes caused by the healing of a wound.
To mark the skin permanently.
