A room in which sets of harness are cleaned, repaired, and stored.(noun)
The Century Dictionary (Public Domain)
Use "harness-room" in a sentence
"I looked at the posts of the gate, in the dark, because they were tall, like father, and then at the door of the harness-room, where he used to smoke his pipe and sing."
"I foraged about and found the side-saddle and bridle in the harness-room."
"A young jockey and horse-trainer, who had trained some horses for my uncle, once talked to me of wicked England while we cooked a turkey for our Christmas dinner, making it twist about on a string in front of his harness-room fire."