Poetry (the term derives from a variant of the Greek term, poiesis, "making") is a form of literature that uses aesthetic and rhythmic qualities of language—such as phonaesthetics, sound symbolism, and metre—to evoke meanings in addition to, or in place of, the prosaicostensible meaning.
Prose is a form of language that exhibits a natural flow of speech and grammatical structure rather than a rhythmic structure as in traditional poetry, where the common unit of verse is based on meter or rhyme. Philosophical, historical, journalistic, and scientific writings are traditionally ranked as literature. They offer some of the oldest prose writings in existence; novels and prose stories earned the names "fiction" to distinguish them from factual writing or nonfiction, which writers historically have crafted in prose.
Drama is the specific mode of fiction represented in performance: a play performed in a theatre, or on radio or television. Considered as a genre of poetry in general, the dramatic mode has been contrasted with the epic and the lyrical modes ever since Aristotle's Poetics (c. 335 BC)—the earliest work of dramatic theory.