/kawl"in'/ , Radio and Television.
n.
1. a program in which listeners or viewers phone in comments or questions to the host or a person being interviewed.
2. a live telephone conversation intended for broadcasting between a program's host and a person being interviewed.
adj.
3. of, pertaining to, or featuring such phone calls or conversations: a call-in program.
[ 1960-65; n. use of v. phrase call in ]