bull pen: Meaning and Definition of

bull' pen"

1. a place where relief pitchers warm up during a game.
2. the relief pitchers on a team.
1. a large cell or room, usually next to the courtroom, where prisoners are temporarily held.
2. a large room in an office occupied by many employees.
3. any temporary or crowded quarters, as sleeping quarters in a lumber camp.
4. a pen for a bull or bulls.