Definition: The term to designate the existence of many worlds or universes.  Contrary to just one world, a uni-verse, there are many worlds, a multi-verse.

More about the term: The multiverse is not monolithic but it is modeled after the contemporary understanding of an inflationary model of the beginning of this universe suggesting a plurality of worlds.  Max Tegmark has championed the most prominent versions of the multiverse.[1]  There are four levels of the multiverse.

1.  Level One:  The level one is, for the most part, more space beyond the observable universe.  So, theoretically, if we were to go to the “edge” of the universe there would be more space.  Having this model as a version of the multiverse may be misleading because there is still only one volume, landscape, or system involved.  A generic prediction of…