broadcast n
1. message that is transmitted by radio or television
2. a radio or television show; "did you see his program last night?" [syn: program, programme] v
3. broadcast over the airwaves, as in radio or television; "We cannot air this X-rated song" [syn: air, send, beam, transmit]
4. sow over a wide area, especially by hand; "broadcast seeds"
5. cause to become widely known; "spread information"; "circulate a rumor"; "broadcast the news" [syn: circulate, circularize, circularise, distribute, disseminate, propagate, spread, diffuse, disperse, pass around}]

Broadcast \Broad"cast`\, n. (Agric.) A casting or throwing seed in all directions, as from the hand in sowing.

Broadcast \Broad"cast`\, a.
1. Cast or dispersed in all directions, as seed from the hand in sowing; widely diffused.
2. Scattering in all directions (as a method of sowing); -- opposed to planting in hills, or rows.

Broadcast \Broad"cast`\, adv. So as to scatter or be scattered in all directions; so as to spread widely, as seed from the hand in sowing, or news from the press.
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Broadcasting is the distribution of audio and video content to a dispersed audience via radio, television, or other, often digital transmission media. Receiving parties may include the general public or a relatively large subset of thereof.

The original term broadcast referred to the literal sowing of seeds on farms by scattering them over a wide field. It was first adopted by early radio engineers from the Midwestern United States to refer to the analogous dissemination of radio signals. Broadcasting forms a very large segment of the mass media. Broadcasting to a very narrow range of audience is called narrowcasting.

Historically, there have been several different types of electronic broadcasting mediums:

Economically there are a few ways in which stations are able to broadcast continually. Each differs in the method by which stations are funded:

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