field house

  1. a building near an athletic field, with lockers, showers, etc. for the athletes' use
  2. a large building for basketball games, indoor track meets, etc.

See field house in American Heritage Dictionary 4

noun
  1. A building having locker rooms and storage and training facilities, located at an athletic field.
  2. A building having one or more areas for different athletic events and usually grandstands for spectators.
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