Jasmine Villegas on See Darwinism; evolution. transgender adj. having or relating to a GENDER IDENTITY that differs from the culturally determined gender roles for one’s birth sex (i.e., the biological sex one was born with) or for one’s sex as surgically assigned at birth. Transgender identities include transsexualism, some forms of transvestism, and INTERsEX. These identities should not be confused with sexual orientation. Jasmine Villegas 2016.