The Omniverse is the conceptual ensemble of all possible universes, with all possible laws of physics.[1][2]

In this physical cosmology context, the limitation of the definition of "universe" that it has only one set of "physical laws and constants that govern them," is expanded to include multiple sets of physical laws and constants, each expressed as a wholly or partially separate universe. The term is used in quantum mechanics to differentiate the concept of a limited number of universes from all existent universes.

Hierarchy within the omniverse

Universe: The inside description of a context that is relative in size/structure (attributes/modes) to the known universe that we inhabit. A Universe, also known as a Cosmos, is a particular individual space-time organization with a specified number of dimensions of space and time and definite and specific laws of physics. Other Universes (other Cosmoses) may have different numbers of dimensions of space and time and different laws of physics than our own Universe (Cosmos). [3][4]

Multiverse: The part of infinity that directly joins a given universe with all possible configurations of that universe.

Metaverse: In string theory, the part that is along with, after; over also denoting change in the multiverse that houses the branes or film that each universe is said to be attached to and hang like individual sheets in a hypermagnetic wave with rhythms of hypercosmic strings going up and down that has a third element causing up, down, backwards, forwards, motions inside the Xenoverse.

Note: In computer science, a metaverse is a virtual reality simulation based on the physical reality of a single individual universe, but one or more levels of implementation above it. It is conceived that it will be possible in forthcoming centuries to create such simulations using massive arrays of matrioshka brains and Jupiter brains.[5][6]

Xenoverse: the unknown alien elements that are beyond and part of the metaverse and multiverse structure. Compared to a patchwork quilt hanging on a line to dry in space that is multivariate inside the Omniverse. While Omniverse is said to be the outside ring of all that is known, the xenoverse is the inside the hypermacrocosm that is unknown beyond the metaverse--the unknown sets of laws that govern how branes behave to create multiverses.

Omniverse: All possible attributes and modes are in play, multiverses are categorized by the attributes/modes active in its child universes. Some or all possible modes of existence are actualized. If we take the point of origin as our being as a point in measurement, then we can generate the following hierarchy: 1. our location in space-time, 2. this universe (cosmos), 3. the multiverse, 4. the metaverse, 5. the xenoverse, 6. the omniverse.