TV:

tele·vi·sion

1 : an electronic system of transmitting transient images of fixed or moving objects together with sound over a wire or through space by apparatus that converts light and sound into electrical waves and reconverts them into visible light rays and audible sound.
(Philo Farnsworth, inventor)

2 : a television receiving set
(That thing that lets you see what's on your TiVo)

3 a : the television broadcasting industry b : television as a medium of communication
(666 channels of crap)

4 : the glass teat
(by Harlan Ellison. It's a book. You can read, can't you?)