What is the meaning of Gymnasium?

A large room or building for indoor sports.

A type of secondary school in some European countries which typically prepares students for university; grammar school, prep school

A public place or building where Ancient Greek youths took exercise, with running and wrestling grounds, baths, and halls for conversation.

grammar school

gymnasium (a type of secondary school)

a type of secondary school (for 12 to 18 year-olds) which prepares students for university or vocational school, and which offers classes in Latin and/or Greek

school of sports which the Greeks had in antiquity

gymnasium

alternative form of gymnas

alternative form of gymnas

gymnasium; upper secondary school: either theoretical ("preparing for further studies") or vocational, most commonly three years long (grades 10-12)

a (part of a) school where gymnasium students are taught

Source: wiktionary.org