Trans's a Latin noun or prefix, meaning "across", "beyond" or "on the opposite side". Trans may refer to: Geography Trans, Mayenne, France Trans, Switzerland Science and technology Trans lunar in astronomy means outside the Moon's orbit Trans isomer in chemistry's a double bond stereoisomer Trans acting in molecular biology's an external factor which acts on a molecule Miscellaneous Trans (album), by Neil Young Trans (Festival), an annual arts festival in Belfast, Northern Irelan… (More on Trans)