means A device that receives broadcast or cable signals and displays moving images with sound, originally the dominant form of home entertainment and now mostly a secondary screen.

from Short for television, from the prefix tele- (far) and Latin visio (sight). The technology emerged in the 1920s from competing inventors racing to transmit moving images wirelessly. By the 1950s, the TV set became the central altar of the American living room, reshaping everything from dinner habits to political campaigns.