- a place where relief pitchers warm up during a game.
- the relief pitchers on a team.
- a large cell or room, usually next to the courtroom, where prisoners are temporarily held.
- a large room in an office occupied by many employees.
Origin of bull pen
Examples from the Web for bull pen
The prisoners were finally put in the "bull-pen," and the brigade permitted to go into camp.
Unlock him at seven in the morning, and let him come to the bull-pen.Roads of Destiny|O. Henry
His imagination travelled on beyond the bull-pen, to the shabby dance-halls along the river.Children of the Desert|Louis Dodge
So I said, “Lodgers are often forced into the bull-pen, too, are they not?”Broke|Edwin A. Brown
He could not throw well enough to make his mark in that famous West ern game of bull-pen.The Hoosier Schoolmaster|Edward Eggleston