ultima Thule
- any far-off, unknown region
- the farthest limit, uttermost degree, etc.
Thule (northernmost region)
See ultima Thule in American Heritage Dictionary 4
(tho͞oˈlē)
noun- The northernmost region of the habitable world as thought of by ancient geographers.
- A distant territory or destination.
- A remote goal or ideal: “the ultima Thule of technology, the ne plus ultra . . . the answer to every earthly problem” (John Gould).