Transmasculine is an umbrella term that describes people who were assigned female at birth but identify with masculinity. It is often abbreviated as "transmasc" and includes a diverse range of gender identities that defy binary notions of male and female. Transmasculine people feel a connection with masculinity but may not identify as male, and they may use a variety of pronouns, including "he/him," "they/them," and "she/her". Some common identities that fall under the transmasculine umbrella include:

• Transgender men
• AFAB nonbinary people who identify with masculinity
• AFAB demiboys (who partially identify as a boy, man, or masculine)
• AFAB gender-fluid people who identify with masculinity, whether its all, most, or some of the time
• Other AFAB people who identify with masculinity

Transmasculine people may choose to undergo medical transition, such as hormone therapy or surgery, to align their bodies with their gender identity. However, not all transmasculine people choose to do so, and there are many ways to express ones gender identity beyond medical transition. Despite the growing number of transmasculine people, they are often excluded from conversations about transgender experiences, in part because media representations tend to focus on white, physically able trans men who "pass" as cisgender men.