A LEPER is a person who has been shunned by society due to having a contagious and often disfiguring disease. The term 'LEPER' is derived from the biblical term for someone who was socially excluded due to their illness. In modern times, leprosy is the most common cause of leprosy, but other diseases can also lead to social exclusion. As a result, a LEPER is someone who has been ostracized by society due to their illness.