(Elec.) A wire connecting an antenna to a receiver or a transmitter to a transmission line.
2.
(Radio and Television Broadcasting) The short segment of a program or program script introducing and immediately preceding another part of the program or a commercial.
... almost calm next morning, and all hands were in readiness to advance the wireless mast another stage. Previously there had been three masts, one high one in three lengths, and two smaller ones of one length each, between which the aerial stretched; the "lead-in" wires being connected to the middle of the aerial. This is known as an "umbrella aerial." Since we were without one short mast it was resolved to erect a "directive" [capital gamma gjc]-shaped aerial. The mainmast was to be in two instead of three lengths, and ... — The Home of the Blizzard • Douglas Mawson
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