| Noun | 1. | lead-in - the introductory section of a story; "it was an amusing lead-in to a very serious matter" section, subdivision - a self-contained part of a larger composition (written or musical); "he always turns first to the business section"; "the history of this work is discussed in the next section" |
| 2. | lead-in - wire connecting an antenna to a receiver or a transmitter to a transmission line conducting wire, wire - a metal conductor that carries electricity over a distance |