Radio and Television.
[ kawl-in ]
/ ˈkɔlˌɪn /
a program in which listeners or viewers phone in comments or questions to the host or a person being interviewed.
a live telephone conversation intended for broadcasting between a program's host and a person being interviewed.
of, relating to, or featuring such phone calls or conversations: a call-in program.
Origin of call-in
First recorded in 1960–65; noun use of verb phrase call in
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for call-in
During his call-in show, by the way, he casually admitted that they were, in fact, Russian soldiers.Why Snowden’s ‘Challenge’ to Putin on Russian Surveillance Doesn’t Matter|Cathy Young|April 20, 2014|DAILY BEAST
Then a call-in card was sent to him—this was a message card by mail 5-3-63.Warren Commission (10 of 26): Hearings Vol. X (of 15)|The President's Commission on the Assassination of President Kennedy