apostrophe
Words that are spoken to a person who is absent or imaginary, or to an object or abstract idea. The poem God's World by Edna St. Vincent Millay begins with an apostrophe: “O World, I cannot hold thee close enough!/Thy winds, thy wide grey skies!/Thy mists that roll and rise!”
assonance
The repetition or a pattern of similar sounds, especially vowel sounds: “Thou still unravished bride of quietness,/Thou foster child of silence and slow time” (“Ode to a Grecian Urn,” John Keats).
ballad
A poem that tells a story similar to a folk tale or legend and often has a repeated refrain. “The Rime of the Ancient Mariner” by Samuel Taylor Coleridge is an example of a ballad.
ballade
A type of poem, usually with three stanzas of seven, eight, or ten lines and a shorter final stanza (or envoy) of four or five lines. All stanzas end with the same one-line refrain.
blank verse Poetry that is written in unrhymed iambic pentameter. Shakespeare wrote most of his plays in blank verse.