A fictional universe is the internally consistent fictional setting used in a narrative work or work of art, most commonly associated with works of fantasy and ...
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science fiction. Fictional universes appear in novels, comics, films, television shows, video games, art, and other creative works.
A fictional universe may be an alternative version of the real world, differing only in the particulars of the story. All fiction, in this sense, is set in a fictional universe, since at least some of its characters, events, and places are not real; the term "fictional universe", however, is usually not applied to worlds that do not contain speculative elements.