n. A lockup; a station-house; a watch-house.n. Nautical: A cabin or apartment on the after part of the quarter-deck, having the poop for its roof: formerly sometimes called the coach; also, the poop itself.n. An erection abaft the mainmast for the accommodation of the officers or crew of a vessel.n. On American railroads, a building, usually round and built of brick, having stalls for the storage of locomotives, with tracks leading from them to a central turn-table. In Great Britain called engine-house or engine-shed.n. A privy.