Definitions for call-in
Random House Webster's College Dictionary
a radio or television program in which listeners or viewers phone in questions or comments.
Category: Radio and Television, Showbiz
(adj.)featuring such phone calls:
a call-in program.
being a transaction conducted by telephone:
a call-in order.
Origin of call-in:
a telephone call to a radio station or a television station in which the caller participates in the on-going program
summon to enter
"The nurse called in the next patient"
summon to a particular activity or employment
"Experts were called in"
visit, call in, call(verb)
pay a brief visit
"The mayor likes to call on some of the prominent citizens"
take a player out of a game in order to exchange for another player
make a phone call
"call in to a radio station"; "call in sick"
call, call in(verb)
demand payment of (a loan)
"Call a loan"
recall, call in, call back, withdraw(verb)
cause to be returned
"recall the defective auto tires"; "The manufacturer tried to call back the spoilt yoghurt"
Such a radio programme
Such a call
In which members of the public telephone the studio and talk live to the presenter.