ultima Thule
Concise Oxford English Dictionary © 2008 Oxford University Press:
ultima Thule/ʌltɪməˈθuːliː/
▶noun a distant unknown region; the extreme limit of travel and discovery.
– origin L., lit. ‘furthest Thule’, a country to the north of Britain (prob. Norway), believed by ancient Greeks and Romans to be the northernmost part of the world.
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