ROUNDHOUSE

n. 1 a circular repair-shed for railway locomotives, built round a turntable. 2 sl. a a blow given with a wide sweep of the arm. b US Baseball a pitch made with a sweeping sidearm motion. 3 hist. a prison; a place of detention. 4 Naut. a cabin or set of cabins on the after part of the quarterdeck, esp. on a sailing-ship.