A trans woman is a male-to-female (MTF) transsexual or transgender person. Many people in this group like the name trans woman over the many medical terms that are out there. Other non-medical names are t-girl, tg-girl, and ts-girl.[1][2] Transgender woman, though, is the more common name.[1]
Some people who are assigned male at birth later identify as women. They feel that the gender they were assigned and the gender they actually are do not match. Some trans women want to simply be called "women" rather than being called a "trans" woman, but this does not apply to all trans women.