A transgender person (often shortened to trans person) is someone whose gender identity differs from that typically associated with the sex they were assigned at birth. Some transgender people who desire medical assistance to transition from one sex to another identify as transsexual. Transgender is also an umbrella term; in addition to including people whose gender identity is the opposite of their assigned sex (trans men and trans women), it may also include people who are non-binary or genderqueer. Other definitions of transgender also include people who belong to a third gender, or else conceptualize transgender people as a third gender. The term may also include cross-dressers or drag kings and drag queens in some contexts.The term transgender does not have a universally accepted definition, including among researchers.