1. [N. Amer] A place on a baseball field where relief pitchers can warm up during a game
   "The manager called to the bullpen to get a pitcher ready"
    
2. [N. Amer] A large cell where prisoners (people awaiting trial, sentence, refugees or illegal immigrants) are confined together temporarily
   "The overcrowded bullpen held dozens of immigrants awaiting processing";
   - detention cell
    
3. An enclosed area used to hold bulls
   "The rodeo bulls were kept in the bullpen before the event"

Derived forms: bullpens

Type of: area, cell, jail cell, peter [Austral, NZ, informal], prison cell

Part of: ballpark [N. Amer], park

Encyclopedia: Bullpen