Outer Gallifrey referred to the wastelands around the Capitol. Home to the outsiders, it was characterised by the Time Lords as a "barbarian garden". (TV: The Invasion of Time)
Slothe was a village in the foothills of the mountains of Outer Gallifrey. (PROSE: Blind Fury)
Rassilon banished Snowana to the wastelands of Outer Gallifrey when the Matrix informed him that she had the power to destroy Gallifrey. (PROSE: Snow White and the Seven Keys to Doomsday)