multiverse

noun3

1. •
   The hypothetical group of all the possible universes in existence.

   • Our universe is a very small part of the multiverse.
2. •
   The different canons, continuities or timelines of a fictional property, considered as a whole.

   • In the DC multiverse, our reality is called "Earth-33". But in the Marvel multiverse, it's "Earth-1218".
3. •
   The world, considered as lacking in purpose, design, or predictability.

   • Visible nature is all plasticity and indifference, a multiverse, as one might call it, and not a universe. — 1895