What term is used to define a fixed number of lines of verse forming a unit of a poem?

The term that defines a fixed number of lines of verse forming a unit of a poem is "stanza." Stanzas serve as the structural divisions within a poem, similar to paragraphs in prose, grouping lines together to convey a specific idea, feeling, or theme. Each stanza can vary in length, but the critical aspect is that it provides a framework that helps organize the poem and supports its overall rhythm and meaning.

In contrast, repetition refers to the intentional reuse of words or phrases to emphasize a point, while satire is a genre of literature that uses humor or exaggeration to criticize or mock societal issues or individuals. Rhythm pertains to the pattern of sounds and beats in poetry, influencing its musicality but not defining its structural units. Understanding these terms helps clarify the unique role a stanza plays in poetry as a foundational element of poetic form.