Parallel universe may refer to:

Look up alternate universe, alternate universes, parallel universe, parallel universes, or parallel world in Wiktionary, the free dictionary.

• Many-worlds interpretation of quantum mechanics, which implies the existence of parallel universes
• Multiverse, the sum of all universes, e.g. everything that exists

• Possible world, a construct in metaphysics to bring rigor to talk of logical possibility
• Modal realism, an account of possible worlds according to which they are all just as real as the actual world
• Extended modal realism, the view that all worlds, possible as well as impossible, are as real as the actual world

• Parallel universes in fiction, a hypothetical self-contained plane of existence, co-existing with one's own
• Alternate history, a genre of fiction in which historical events differ from reality
• Alternative universe (fan fiction), fiction by fan authors that departs from the fictional universe of the source work

• Metaverse, a collective virtual shared space
• Alternate reality (disambiguation)
• Multiverse (disambiguation)
• Parallel World (disambiguation)

This disambiguation page lists articles associated with the title Parallel universe.
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