noun
In music, the initial section of a movement or piece where the main themes are presented, especially in sonata form.
ソナタ形式の提示部では、二つの主題が提示される。
In the exposition of sonata form, two themes are presented.
The recapitulation section that restates the exposition's themes, usually in the home key.
提示 (presentation) + 部 (section). A straightforward compound used in music theory.