roundhouse

Concise Oxford English Dictionary © 2008 Oxford University Press:
roundhouse/ˈraʊndhaʊs/

▶noun

• 1 a railway locomotive maintenance shed built around a turntable.

• 2 informal a blow given with a wide sweep of the arm.

  ■ Baseball a slow, widely curving pitch.

  ■ a wide turn on a surfboard.

• 3 chiefly historical a cabin or set of cabins on the quarterdeck of a sailing ship.