Adjective
(science fiction) Originating outside the known physical reality of the universe.
(science fiction) Coming from a world outside Einsteinian space-time.
Source: en.wiktionary.orgI've never been so frightened for somebody in my life: I felt totally powerless. You can't punch extradimensional parasites out of your boyfriend's brain. Charles Stross
He is eventually killed when his body becomes host to an extradimensional being infecting the timestream. Source: Internet
Players gained all sorts of new items with Control's AWE DLC, included in this, is the Extradimensional Suit. Source: Internet
In the modern day, this not only extends to outer space, but to extradimensional planes of existence. Source: Internet