the broadcasting of a still or moving image via radiowaves to receivers that project a view of the image on a picture tube.
the process involved.
a set for receiving television broadcasts.
the field of television broadcasting.

1905–10; tele-1 + vision

televisional [tel-uh-vizh-uh-nl] , adjective
televisionally, adverb
televisionary [tel-uh-vizh-uh-ner-ee] , adjective
pretelevision, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
television (ˈtɛlɪˌvɪʒən)
1.  the system or process of producing on a distant screen a series of transient visible images, usually with an accompanying sound signal. Electrical signals, converted from optical images by a camera tube, are transmitted by UHF or VHF radio waves or by cable and reconverted into optical images by means of a television tube inside a television set
2.  Also called: television set a device designed to receive and convert incoming electrical signals into a series of visible images on a screen together with accompanying sound
3.  the content, etc, of television programmes
4.  the occupation or profession concerned with any aspect of the broadcasting of television programmes: he's in television
5.  (modifier) of, relating to, or used in the transmission or reception of video and audio UHF or VHF radio signals: a television transmitter
[C20: from tele- + vision]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1907, "the action of seeing by means of Hertzian waves or otherwise, what is existing or happening at a place concealed or distant from the observer's eyes" [OED]; in theoretical discussions about sending images by radio transmission, formed in English or borrowed from Fr. télévision,
from tele- + vision. Other proposals for the name of this then-hypothetical technology were telephote (1880) and televista (1904). The technology was developed in the 1920s and '30s. Nativized in Ger. as Fernsehen.
"Television is the first truly democratic culture -- the first culture available to everyone and entirely governed by what the people want. The most terrifying thing is what people do want." [Clive Barnes, "New York Times," Dec. 30, 1969]
Meaning "a television set" is from 1955. Shortened form TV is from 1948.
Online Etymology Dictionary, © 2010 Douglas Harper
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Computing Dictionary

television definition

A dedicated push media device for receiving streaming video and audio, either by terrestrial radio broadcast, satellite or cable.
The Free On-line Dictionary of Computing, © Denis Howe 2010
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Example sentences
They've also extended the party well past game time, often catching the plays
  on radio or television as they continue feasting.
My discipline is communications, specifically film, television and radio
  production and criticism.
Tell us which shows from the new television season will be ratings winners and
  which will be canceled.
College courses based around television shows or movies are nothing new.
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