- the ancient Greek and Latin name for an island or region variously identified as one of the Shetland Islands, Iceland, or Norway: supposed to be the most northerly region of the world.
- ultima Thule.
- a settlement in northwestern Greenland: site of a U.S. air base.
- of or relating to an Indigenous culture flourishing from a.d. 500 to 1400, and extending throughout the Arctic from Greenland to Alaska.
- a region believed by ancient geographers to be the northernmost land in the inhabited world: sometimes thought to have been Iceland, Norway, or one of the Shetland Islands
- an Inuit settlement in NW Greenland: a Danish trading post, founded in 1910, and US air force base
