See more synonyms for lead-in on Thesaurus.com
  1. something that leads in or introduces; introduction; opening.
  2. Radio, Television.
    1. the connection between an antenna and a transmitter or receiving set.
    2. the portion of a program or script that precedes or introduces a commercial.
  1. (of a conductor) carrying input to an electric or electronic device or circuit, especially from an antenna.

Origin of lead-in

First recorded in 1910–15; noun, adj. use of verb phrase lead in
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for lead-in


    1. an introduction to a subject
    2. (as modifier)a lead-in announcement
  1. the connection between a radio transmitter, receiver, etc, and the aerial or transmission line
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012