: Identities that do not fit within the traditional "male" or "female" categories.

While the term "transgender" gained popular use in the 1960s and 1970s, trans and gender-diverse people have existed throughout history. A Map of Gender-Diverse Cultures | Independent Lens - PBS

Transgender (or "trans") is an umbrella term for people whose gender identity—their internal sense of being male, female, or another gender—differs from the sex they were assigned at birth.

: Describes individuals whose gender identity matches their assigned sex.