A transsexual, transgender, or transvestite person, usually a trans woman.
A mechanical transmission, a gearbox.
A transistor radio.
A transformer.
A transition between moves.
A transsexual person.
Having changed, or being in the process of changing, physical sex (because it does not match desired sex) by undergoing medical treatment such as hormone replacement therapy (HRT) and optionally sex reassignment surgery (SRS), or rarely only SRS.