Dimensional transcendentalism



A dimensionally transcendental, sometimes called transcendentally dimensional, object was one which appeared larger inside than outside, an effect made possible by transdimensional engineering.

It's Bigger on the Inside
Many of the Doctor's companions were in awe of police box that was larger within, often commenting that "it's bigger on the inside." (TV: The Three Doctors, Robot, Rose, The Runaway Bride, Smith and Jones, The Eleventh Hour, The Bells of Saint John) The Doctor looked forward to this. (TV: The Vampires of Venice)