Identifying as or having undergone medical treatment to become a member of the opposite sex, overwhelmingly desirous of being, or completely identifying with, the opposite sex, of a person Being a transsexual, noun_ A person whose gender self-image contradicts with the physical gender he/she was born with, a person whose sexual identification is entirely with the opposite sex, A person whose gender self-image contradicts with the physical gender he/she was born with