Pronunciation: (lēd'in"), [key]
1. something that leads in or introduces; introduction; opening.
2. Radio, Television.
a. the connection between an antenna and a transmitter or receiving set.
b. the portion of a program or script that precedes or introduces a commercial.
(of a conductor) carrying input to an electric or electronic device or circuit, esp. from an antenna.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.