Multiverse

From Encyclopedia Jumpleadia

The Multiverse is Everything. It contains every possible Universe. As there are an infinite number of infinitely-sized Universes, the size of the Multiverse is, mathematically, infinity to the power of infinity. In actual fact the Multiverse is finite, it just hasn't been determined what that upper limit is yet.

While in other comics and TV shows the term "Universe" is used to describe the fictional world those events take place in, the fictional world of Jump Leads contains multiple Universes. Therefore the fictional environs of the comic are referred to as the Jump Leads Multiverse. This just goes to show something, but I'm not sure what.