No-time

No-time, or non-time, was a form of time that existed outside the normal universe.

The Time Vortex was composed of no-time and no-space, (AUDIO: The Forbidden Time) just as interstitial time was an envelope of non-time and non-space underlying the "real" universe, surrounding and separating every spacetime event. (PROSE: Falls the Shadow)

When the Fifth Doctor regenerated, he experience no-time, suspended in a kind of limbo. (PROSE: The Caves of Androzani)