Ternary form

EnglishForm & Structure

A three-part form (ABA) where the first section returns after a contrasting middle section.

How Composers Use It

Ternary form is fundamental to song forms, minuets/trios, and character pieces. The A section establishes the main idea, B provides contrast (often in a new key), and the return of A provides satisfying closure. The return can be exact (da capo) or modified.

Example

Chopin's Nocturne in E-flat, Op. 9 No. 2 — a clear ABA structure with an ornamental return of A.

Related Terms

Binary form Rondo Da capo

Ternary form is one of 228 terms in the Gradus musical dictionary, where every definition is written around how composers actually use the word.

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