D defs.my
Entry 3 senses Webster, 1913

Roundhouse

/roun'-dhousˌ/ · Round·house · IPA /ˈɹaʊndˌhaʊs/
01 n. A constable's prison; a lockup, watch-house, or station house.
  1. 1.
    A constable's prison; a lockup, watch-house, or station house.[Obs.]
  2. 2.
    A cabin or apartment on the after part of the quarter-deck, having the poop for its roof; -- sometimes called the coach.(Naut.) Also: coach
  3. 3.
    A house for servicing and repair of locomotive engines, built circularly around a turntable bearing railroad tracks, with several tracks leading in and out.