everything

thumb|upright=1.25|The universe is everything that exists theoretically. ([[Hubble Ultra-Deep Field image of distant galaxies pictured)]]

Everything, every-thing, or every thing, is all that exists; it is an antithesis (opposite) of nothing, and its complement. It is the totality of things relevant to some subject matter. The universe is everything that exists theoretically, though a multiverse may exist according to theoretical cosmology predictions. It may refer to an anthropocentric worldview, or the sum of human experience, history, and the human condition in general. Every object and entity is a part of everything, including all physical bodies and in some cases all abstract objects.