A '''sonata''' is a specialized musical form written for instruments. The sonata became a highly-evolved form of music during the [[classical music|Classical era]], and eventually came to compromise four or more movements.
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A '''sonata''' is a specialized musical form written for instruments rather than voices. Over the course of the 18th-century in Central Europe, the sonata became a highly-evolved form of music in which every serious composition for solo [[piano]], [[chamber music]] ensemble, or symphony [[orchestra]] was written. While sonata composition reached its height of importance around the turn of the 19th-century, it left a substantial imprint on the formal thinking of Western composers throughout the next two centuries, and its principles are still taught worldwide today to students in all disciplines of classical music.
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The term ''sonata'' in common usage can have one or more of three different meanings:
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*The general title for a large work written for instruments, often with piano or for piano solo, and until the late 19th-century implying multiple movements in contrasting tempi.
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*The multi-movement plan of such a work, either in three movements (fast-slow-fast), or in four (fast-slow-minuet (scherzo)-fast).
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*The specific form or principle usually employed in the first movement of such a work, though also often used in other movements of the work.