An instrumental genre in several movements for a soloist or an ensemble. The original usage for the term "sonata" implied a composition that was to be played rather than sung. Later, the term "sonata" came to be understood as a four movement piece: slow, fast, slow, fast, as was used in the church sonata (sonata da chiesa), or allemande, courante, sarabande, and gigue, as was used in the chamber sonata (sonata da camera). As the sonata developed, it became longer and adopted the sonata-allegro form for the first movement, which was generally fast. The following movement was generally somewhat slower, and the number of movements varied, but was generally about three. In the early 18th century, the term "symphony" was applied to any instrumental prelude, interlude, or postlude. In modern usage, the term is applied to a large composition for orchestra, generally in three or four movements. The symphony may also be defined as a sonata for orchestra. The earlier symphonies, those of the Classical era, were generally simpler, and of a smaller scale. By the late Romantic era, the symphony had grown in number of movements, length of movements, number of instruments, variety of instruments, and dynamic range.