bull pen

or bull·pen


noun

Baseball.
  1. a place where relief pitchers warm up during a game.
  2. the relief pitchers on a team.
Informal.
  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.
any temporary or crowded quarters, as sleeping quarters in a lumber camp.
a pen for a bull or bulls.

Origin of bull pen

1800–10, Americanism for def 4; 1920–25 for def 1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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