Identifying marks are symbols or signs that are used to distinguish one thing from another. A SCAR is a mark left on the skin after a wound or injury has healed. It is usually permanent and can be used to identify a person or animal. A BRAND is a mark made by burning or stamping with a hot iron, which is often used to identify livestock or products. A STIGMA is a mark of disgrace or discredit that is associated with a person or group. It is often used to identify someone as being different from the norm.