tesseract /ˈtɛ.səˌɹækt/ noun2 •The four-dimensional analogue of a cube; a 4D polytope bounded by eight cubes (analogously to the way a cube is bounded by six squares).Hence the cube determined by these axes is the face of the tesseract which we now have before us. — 1906 •Any of various fictional mechanisms that explain extradimensional, superluminal, or time travel outside the geometry of the physical universe."I shall just sit down for a moment and pop on my boots and then I'll be on my way. Speaking of ways, pet, by the way, there is such a thing as a tesseract." — 1962 formstesseracts