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in music, a shorter and often lighter form of the sonata, usually in three short movements (i.e., independent sections). The first movement normally follows the sonata form with respect to the exposition and recapitulation of the musical materials but not necessarily the development section, which is either quite perfunctory or lacking altogether. The sonatina form without development is also found in certain slow movements of full-fledged 18th-century sonatas and in opera overtures (e.g., Mozart's Marriage of Figaro)