Round"house` (?), n.
1.
A constable's prison; a lockup, watch-house, or station house.
[Obs.]
2. Naut. (a)
A cabin or apartament on the after part of the quarter-deck, having the poop for its roof; -- sometimes called the coach.
(b)
A privy near the bow of the vessel.
3.
A house for locomotive engines, built circularly around a turntable.
© Webster 1913.