1. workplace consisting of a circular building for repairing locomotives;
2. a hook delivered with an exaggerated swing;
The Collaborative International Dictionary of English v.0.48:
Roundhouse \Round"house`\, n.
1. A constable's prison; a lockup, watch-house, or station
(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
WordNet (r) 3.0 (2006):
n 1: workplace consisting of a circular building for repairing
2: a hook delivered with an exaggerated swing
Moby Thesaurus II by Grady Ward, 1.0:
21 Moby Thesaurus words for "roundhouse":
Long Melford, backhand, backhander, backstroke, boathouse,
bolo punch, carbarn, carport, carriage house, fix-it shop, garage,
hangar, haymaker, hook, one-two, repair shop, round-arm blow,
short-arm blow, sidewinder, swing, uppercut