EXTRA-MUNDANE SPACE, is the infinite, empty, void space, which is by some supposed to be extended beyond the bounds of the universe, and consequently in which there is really nothing at all. The phrase extramundane space has been so long in use among our best writers, that it is now impossible to banish it from the language; and yet it has been the source of some extravagant mistakes. Many philosophers consider space as something real, distinct both from body and mind; and no less a man than Dr Clarke considered it as an attribute of the Deity. Yet we think nothing more evident, than that if body had never existed, space would never have been thought of; and if this be so, extramundane space, instead of denoting any real thing, or attribute infinitely extended, can mean nothing more
than the possibility of enlarging the corporeal universe, however widely extended it may be. See METAPHYSICS (Encycl.), Part II. ch. iv.