(1):

(n.) A constable's prison; a lockup, watch-house, or station house.

(2):

(n.) A privy near the bow of the vessel.

(3):

(n.) A house for locomotive engines, built circularly around a turntable.

(4):

(n.) A cabin or apartament on the after part of the quarter-deck, having the poop for its roof; - sometimes called the coach.