A movement is one section of a larger work. Symphonies are often in four movements. Concertos are in three movements. Oratorios usually have many more movements. G. F. Handel's Messiah has 53 movements. A movement is part of a larger work and not normally meant to be performed alone, although some do. Messiah is rarely performed in its entirety. When movements are used it becomes the larger structure of a piece's form.