Multiverse

The multiverse (or metaverse) is the set of possible universes, including the universe in which we live. Together, these universes comprise everything that exists: the entirety of space, time, matter, energy, and the physical laws and constants that describe them.

The various universes within the multiverse are called paraverses, "parallel universes", "other universes", or "alternative universes". The multiverse is contained by the megaverse and it contains the Universe