A musical form having 3 sections -- exposition and development and recapitulation; characteristic of 1st movement of a sonata or symphony WordNet 3.0

The form of a movement, which consists of exposition and development and recapitulation Open English WordNet

Sonata form is a musical structure generally consisting of three main sections: an exposition, a development, and a recapitulation. Wikipedia

A way of organizing the composition of a work of music Wikipedia Disambiguation

Musical form Wikidata

A form of classical music consisting of a single movement divided into three main sections, namely - the exposition (introducing thematic material in the tonic and then usually the dominant key), development (manipulating the theme in different keys) and recapitulation (returning to the tonic), sometimes followed by a coda. Wiktionary

A form of classical music. Wiktionary (translation)