a penitentiary (usually preceded by the).
Origin of big house
First recorded in 1815–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for big house
I was raised in the big-house, and helped as a servant-girl.Slave Narratives Vol. XIV. South Carolina, Part 2|Works Projects Administration