Fable is a literary genre: a succinct fictional story, in prose or verse, that features animals, legendary creatures, plants, inanimate objects, or forces of nature that are anthropomorphized, and that illustrates or leads to a particular moral lesson (a "moral"), which may at the end be added explicitly as a concise maxim or saying.

A fable differs from a parable in that the latter excludes animals, plants, inanimate objects, and forces of nature as actors that assume speech or other powers of humankind. Conversely, an animal tale specifically includes talking animals as characters.

Usage has not always been so clearly distinguished. In the King James Version of the New Testament, "μῦθος" ("mythos") was rendered by the translators as "fable" in the First Epistle to Timothy, the Second Epistle to Timothy, the Epistle to Titus and the First Epistle of Peter.

A person who writes fables is a fabulist.