Meaning of TRANSMISSION in English
1》 the action or process of transmitting or the state of being transmitted.
2》 a programme or signal that is transmitted.
3》 the mechanism by which power is transmitted from an engine to the axle in a motor vehicle.
C17: from L. transmissio (see trans- , mission ).
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004