A gym - physical exercises and activities performed inside, often using equipment, especially when done as a subject at school. Gymnasium is a large room with equipment for exercising the body and increasing strength or a club where you can go to exercise and keep fit.

A gym - physical exercises and activities performed inside, often using equipment, especially when done as a subject at school. Gymnasium is a large room with equipment for exercising the body and increasing strength or a club where you can go to exercise and keep fit.