Relative dimension

The acronym "TARDIS" came from the phrase "Time And Relative Dimension In Space". (TV: An Unearthly Child) Other accounts indicated there were multiple relative dimensions. (TV: The Time Meddler, et al.)

Some accounts indicated the relative dimensions included Imagination, (PROSE: Cat's Cradle: Time's Crucible, AUDIO: Auld Mortality) Inner Space-Time, (PROSE: Cat's Cradle: Time's Crucible) and possibility theory. (AUDIO: Auld Mortality)

Marnal believed that the term "relative dimensions" referred to the five dimensions in which time travel occurred, and how time travellers shared a relative present in overtime no matter which point in time they visited. (PROSE: The Gallifrey Chronicles) To a Time Lord, the phrase "time is relative" referred to the fact that a TARDIS could travel to the past and future, but not its own past and future. (PROSE: The Gallifrey Chronicles, The Infinity Doctors)

When a TARDIS was destroyed, its relative dimensions would evaporate. (PROSE: The Quantum Archangel)