1. [n]  message that is transmitted by radio or television
2. [n]  a radio or television show; "did you see his program last night?"
3. [adv]  so as to scatter or be distributed widely or in all directions
4. [adj]  made widely known especially by radio or television; "the broadcast news"; "everyone heard the broadcast rumors"
5. [adj]  sown by casting over a wide area especially by hand; "the broadcast sowing of wheat"
6. [v]  cause to become widely known; "spread information"; "circulate a rumor"; "broadcast the news"
7. [v]  broadcast over the airwaves, as in radio or television; "We cannot air this X-rated song"
8. [v]  sow over a wide area, esp. by hand; "broadcast seeds"

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

2. \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.
   

3. \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.
   

A transmission to multiple, unspecified recipients. On Ethernet, a broadcast packet is a special type of multicast packet which all nodes on the network are always willing to receive.