Subspace

According to “Treknology Encyclopedia” courtesy of Bernd Schneider’s “Ex Astris Scientia” web site
(http://www.ex-astris-scientia.org/ ), subspace is defined as:

“A domain outside the normal three-dimensional space, rather than another dimension. Effects of mass/energy transition to subspace allow apparent FTL velocities and are used by the warp drive, computer system and subspace radio. Although subspace is probably the most frequently used Treknology term (for more information, see Star Trek) and seems to be involved in almost any 24th century technical device, it is not further explained, neither in the show nor in official publications. Subspace has to be accepted as a basic concept necessary to enable the miraculous 24th century technology. According to the ingenious subspace field theory by the physicist Jason Hinson (see his website), subspace is

"a continuum that exists in conjunction with our own space-time continuum. Every point in our universe has a corresponding point in subspace. Also, at every point in our universe, subspace has a particular frame of reference."