The semi-legendary island of classical antiquity considered to represent the northernmost location in the inhabited world (the Ecumene).

The historical Eskimo culture extending from Alaska to Greenland between the 6th and 14th centuries.

A settlement and airbase in northwestern Greenland established in 1910 by the Danish explorer Knud Rasmussen.

The smaller lobe of the trans-Neptunian object Ultima Thule, a contact binary object.

A place beyond the borders of the known world. / Highest achievement.

plural of ultima Thule

Alternative letter-case form of ultima Thule (“a place beyond the known world; highest achievement”)

(astronomy, informal) Synonym of Arrokoth (“trans-Neptunian object (486958) 2014 MU69”)

Alternative letter-case form of ultima Thule (“a place beyond the known world; highest achievement”)

plural of Ultima Thule