omniverse

This term describes the absolute maximum scale of existence, encompassing not just multiple universes, but every possible mathematical, physical, and conceptual reality. It is primarily used in theoretical physics, cosmology, and speculative science fiction to denote a totality that leaves nothing outside of its boundaries.

Because it represents a singular, all-encompassing totality, the word is treated as an uncountable noun in most academic and philosophical contexts. It functions as a collective singularity, meaning it does not typically take a plural form since there cannot be multiple totalities of everything.