What is the term for a song structure that avoids repetition of entire sections?

The term that describes a song structure which avoids the repetition of entire sections is known as "through composed." This structure is characterized by music that continuously evolves without returning to previous material or sections, thus presenting a flowing, non-repetitive narrative. Through-composed songs often align with lyrical storytelling, where each verse or stanza introduces new musical ideas that correspond to the unfolding text.

In contrast, strophic songs typically involve repeated sections, particularly where the same music is reused for different verses. Binary form consists of two distinct sections, often labeled A and B, which may have a degree of repetition within those sections. Variation form involves altering a given theme or melody while maintaining its core identity, which still implies a foundation of repetition rather than the unique, non-repeating nature of through composed works.