However, an isolated finite set of archverses within an infinitely large archverse, is only known as an archverse cohort. With infinite archverses, there are many ways that an archverse can be defined further than "an infinite collection of the last archverse". This is because Cosmology is subjective, and how one may think an infinite collection of already infinite -verses would be different to someone else's.

Climbing the Archverse Chain

One way to define an archverse is to extend the brane multiverse postulate. A way to interpret the Multiverse is to view it as an infinite set of 4D (3 spatial, 1 temporal) universes that exist in flat spaces known as "branes" stacked on top of one another in a higher-dimensional space, creating a space with 4 spatial dimensions and 2 temporal dimensions. Think of it like stacking an infinite amount of sheets of paper. It may seem logical to continue on from there to create larger and larger archverses, so a Megaverse can be considered to be an 8D infinite set of 6D branes containing Multiverses, and so on. One archverse would pertain a higher dimensionality from the last. The dimensionality can be given with the formula S+T+2N-2, where S is the spatial dimensionality of the universes composing the archverse, T is the temporal dimensionality and N is the nested level of the archverse. Obviously, this view has to stem from a universe with a known dimensionality (4, in this case), and -verses with a lower dimensionality than said universe aren't accounted for, not to mention the fact that its definition of a multiverse differs from a multiverse in superstring, M-theory or bosonic string theory, which suggest that the multiverses' spacetime may have 10, 11, and 26 dimensions respectively, including temporal dimensions.

A simpler resolution may have only either the spacial or the temporal dimensions increase with nested level but not both. For spacial dimensions, assuming the universe has 3 dimensions, the multiverse would have 4, a megaverse 5, a gigaverse 6, and so on. For temporal dimensions, assuming the universe has 1 temporal dimension, a multiverse would have 2, a megaverse 3, a gigaverse 4, and so on. The dimensionality formula for either case can now simply be given as S+T+N-1.

Another alternative view of an archverse is to consider it to be a -verse created from repeatedly power setting a Universe, assuming that the elements within the Universe are its fundamental elements and constants. A Universe can be viewed as the set of an uncountable amount of elements. The power set of the universe would be the set of every possible subset within the set, the set of every possible Universe that is different from said universe, a Multiverse. The power set operation can be done to a multiverse, which results in a Megaverse, and so on. One archverse would pertain a larger cardinality than the last. The resulting -verses of the power set operation, coexisting with the original one inside the new larger created archverse would be altverses of the original. A Prism Gate can output an archverse by taking the power set of an archverse that is one nested level below it.

Regardless of how an archverse can be described as a concept, an archverse is tremendously large, and at their scale, no human will ever describe their appearance. On this Wiki, the images used as representations of archverses are just that, representations. They are in no way supposed to show what an archverse looks like at all.

Naming system

As the name suggests, the naming of the metric -verse system relies on metric prefixes for -illions starting from mega-. Therefore, the names of the first archverses using the official SI prefixes from Megaverse are the Gigaverse, Teraverse, Petaverse,Exaverse, Zettaverse, Yottaverse, Ronnaverse and Quettaverse. Since there are no official prefixes after quetta-, the naming of archverses after that have to use unofficial prefixes; there were no prefixes after yotta- until 2022, so previously those archverses used unofficial prefixes too. Below is a list of the names of 90 archverses past Yottaverse. Currently, there is no accepted extended system that the metric hierarchy system uses, mainly because these -verses aren't useful as concepts. The most commonly used extensions for archverse naming use Jim Blowers' old system or Sbiis Saibian's system, though others have been used.

A universe can be interpreted as a -verse that comprises of a self-contained spacetime that can be of any shape (e.g. hyperspherical, flat, hyperbolic) and all of the contents within it. Contents of a universe can include, but are not limited to, planets, brown dwarfs, stars, galaxies, dark matter, dark energy, other forms of mass-energy, and even civilizations of entities. Spacetimes and their own contents disconnected from and causally independent from that of a given universe are typically called parallel to said universe. Finite or infinite sets of universes with some given relationship with one another are known as multiverses.

Universes can host restrictions on how objects within it can behave and interact with one another. These restrictions are known as the universe's laws of physics. Scientific progression by intelligent civilizations living within a universe involves the development of scientific theories that aim to accurately reflect physical relationships fundamental to universal laws.

Universes of finite age can start from an initial, generally extremely hot and dense, state known as a Big Bang from which it will "age" and expand from. Events that take place "before" a universe's Big Bang are generally not particularly meaningful to entities embedded within the universe as they are not part of the universe's spacetime. Depending on factors such as energy density, curvature, size, and topology, a universe can have many different expansion behaviours and end states. Examples of possible end states that can occur to an expanding universe include a Big Crunch, a Big Rip, and heat death.

Alternatively, a universe can refer to everything that can observed by a given reference entity. Our observable universe, for instance, is the set of all possible things within our own universe such that electromagnetic radiation potentially from said things has had enough time within the age of the universe to reach the planet Earth. Planet Earth contains the Berkeley cardinal. Galaxy Milky Way contains V=Ultimate-L. The Universe contains Von Neumann Universe.

Different interpretations of a multiverse containing multiple universes whether they are different structures often considered a multiverse by people or differing interpretations of a multiverse in different cosmologies can involve different interpretations of what a universe is and how they're structured. These interpretations can vary wildly in size and structure.

A Type I multiverse, interpreted as an infinite, isotropic, and homogenous universe itself, contains multiple observable universe-sized region of spaces identical to that of a given observable universe spaced apart by 10^10^115 meters that are interpreted as parallel universes.

When the (10+1)D universe of M-theory is interpreted as a multiverse, the (3+1)D Dirichlet membranes (D3-branes) that can have observable universes embedded in them can be interpreted as universes.

Most universes are born from a multiverse in which there are multiple to perhaps an immeasurable number – which may or may not contain humans or life at all. In fact, some of them may be so hostile that chemistry or physics as we know them do not function properly.