noun

1. the practice or science of transmitting scenes or views by radio or, sometimes, by wire: the television transmitter, by means of a camera tube, such as an image orthicon or vidicon, converts light rays into electric signals for modulation upon a radio carrier wave or for transmission over wires; the television receiver reconverts the signals into electron beams that are projected against the fluorescent screen of the kinescope, or picture tube, reproducing the original image
2. 1. broadcasting by television as an industry, entertainment, art, etc.
   2. all the facilities and related activities of such broadcasting
3. a television receiving set
4. a television program or programs they watched television last night

Etymology: tele- + vision

adjective