1. A telephone call to a radio station or a television station in which the caller participates in the on-going program
   "The radio show featured a call-in segment where listeners shared their opinions"

1. Summon to enter
   "The nurse called in the next patient"
    
2. Summon to a particular activity or employment
   "Experts were called in"
    
3. Make a phone call
   "call in to a radio station"; "call in sick"
    
4. Pay a brief visit
   "The mayor likes to call in on some of the prominent citizens";
   - visit, call
    
5. Take a player out of a game in order to exchange for another player
   "The manager called in the relief pitcher in the eighth inning"
    
6. Demand payment of (a loan)
   "call in a loan";
   - call
    
7. Cause to be returned
   "call in the defective auto tires";
   - recall, call back, withdraw

Derived forms: called in, calling in, call-ins, calls in

Type of: ask in, call, call up, demand, exact, get together, invite, meet, move out, phone, phone call, remove, ring, send for, take, take out, telephone, telephone call

Encyclopedia: Call-in