gymnasium

Etymology

From Latin gymnasium, from Ancient Greek γυμνάσιον (gumnásion, “exercise, school”), from γυμνός (gumnós, “naked”), because Greek athletes trained naked.

noun

1. (formal) A large room or building for indoor sports.
2. A type of secondary school in some European countries which typically prepares students for university.
3. (historical) A public place or building where Ancient Greek youths took exercise, with running and wrestling grounds, baths, and halls for conversation.