a brokerage firm that buys and sells securities on commission.
Origin of commission house
An Americanism dating back to 1825–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for commission house
He returned without any financial success, and obtained employment for a time in a commission-house on the levee.Mark Twain, A Biography, 1835-1910, Complete|Albert Bigelow Paine