The definition of a call-in is a radio or TV show where listeners participate by making telephone calls to the host.
An example of a call-in is an advice radio show where people contact the host of the show to share their problems on air and get answers.
of or having to do with a radio or TV program during which members of the audience call in by telephone to comment on subjects under discussion, ask questions of guests, etc.: a call-in show
Being in a format such that listeners or viewers are invited to have their phone conversations with the host or guests on a show broadcast to other listeners: a call-in radio show.
- A viewer's or listener's phone conversation with or phone call to the host of such a show.
- A viewer or listener making such a call.