gymnasium

noun3

1. •
   (formal) A large room or building for indoor sports.

   • [I]t is well understood that the building for the gymnasium will be erected on lots now belonging to the College, lying in High-street, immediately in the rear of the Library. — 1859
2. •
   (historical) A public place or building where Ancient Greek youths took exercise, with running and wrestling grounds, baths, and halls for conversation.
3. •
   A type of secondary school in some European countries which typically prepares students for university.