noun

1. 1. a transmitting or being transmitted
   2. something transmitted
2. the part of a motor vehicle, machine, etc. that transmits power from the engine to the driven members, as the wheels, by means of belts, fluids, gears, etc.
3. the passage of radio waves through space between the transmitting station and the receiving station

Etymology: L transmissio < transmissus, pp. of transmittere