Fiction is any creative work, chiefly any narrative work, portraying individuals, events, or places that are imaginary or in ways that are imaginary. Fictional portrayals are thus inconsistent with history, fact, or plausibility. In a traditional narrow sense, "fiction" refers to written narratives in prose – often referring specifically to novels, novellas, and short stories. More broadly, however, fiction encompasses imaginary narratives expressed in any medium, including not just writings but also live theatrical performances, films, television programs, radio dramas, comics, role-playing games, and video games. The publishing industry divides fiction into adult fiction, young adult fiction, new adult fiction, and children's fiction.

A narrative, story, or tale is any account of a series of related events or experiences, whether nonfictional or fictional. Narratives can be presented through a sequence of written or spoken words, through still or moving images, or through any combination of these. The word derives from the Latin verb narrare, which is derived from the adjective gnarus. The formal and literary process of constructing a narrative—narration—is one of the four traditional rhetorical modes of discourse, along with argumentation, description, and exposition. This is a somewhat distinct usage from narration in the narrower sense of a commentary used to convey a story. Many additional narrative techniques, particularly literary ones, are used to build and enhance any given story.