Answer: hyperspace

AnswerCrossword Clue
HYPERSPACETerm common to science fiction and math
HYPERSPACEMilieu for the "U.S.S. Enterprise"
HYPERSPACEFour-dimensional realm
hyperspace(in science fiction) A notional space-time continuum in which it is possible to travel faster than light
hyperspacean imagined space having more than three dimensions
hyperspaceSpace of more than three dimensions