Noun | 1. | ![]() exercise, exercising, physical exercise, physical exertion, workout - the activity of exerting your muscles in various ways to keep fit; "the doctor recommended regular exercise"; "he did some exercising"; "the physical exertion required by his work kept him fit" weightlift, weightlifting - bodybuilding by exercise that involves lifting weights weight gaining - bodybuilding that increases muscle mass and body weight |