What is the section called when the subject drops out altogether in a fugue?

In a fugue, the section where the subject drops out altogether is referred to as an episode. An episode serves as a transitional passage that connects different statements of the subject or theme, creating contrast and maintaining interest while the main thematic material is temporarily absent. Episodes typically develop motifs derived from the main subject or introduce new ideas, allowing the composer to explore harmonic territory without the constraints of the subject's full presentation.

In contrast, the other terms describe different aspects of the fugue form. The exposition is the initial section where the subject is first introduced, while the development refers to sections that manipulate the subject in various ways. The return usually signifies a reprise or return to previously established musical themes, including the subject, rather than the absence of it.