A canto is a major section or chapter of a long poem, similar to how a novel is divided into chapters. The word comes from Italian and Latin words for “song,” because these sections were originally meant to be sung or chanted aloud.

When poets write epic poems that tell grand stories over hundreds or thousands of lines, they divide them into cantos to give readers natural stopping points and to organize different parts of the adventure. Dante's famous medieval poem The Divine Comedy contains 100 cantos, each one advancing his journey through the afterlife. Lord Byron's Don Juan has 17 cantos that follow the hero's travels and misadventures.

Think of cantos like episodes in a long television series: each one moves the story forward but forms a complete unit you can read in one sitting. A canto might cover a single battle, a conversation between characters, or a description of a new place the hero discovers. Poets often begin each canto with a fresh scene or shift in tone, helping readers follow along through what might otherwise feel like one overwhelming wall of text.

The word usually applies to serious, classical poetry rather than modern free verse or song lyrics. When you see a long narrative poem divided into numbered sections labeled “Canto I,” “Canto II,” and so on, you know the poet is working in this traditional epic style.