Definition from Wiktionary, the free dictionary
tesseract (plural tesseracts)
- (mathematics) The four-dimensional analogue of a cube; a 4D polytope bounded by eight cubes (in the same way a cube is bounded by six squares).
- (science fiction) Any of various fictional mechanisms that explain extradimensional, superluminal, or time travel outside the geometry of the physical universe.
four-dimensional analogue of a cube