Hyperborean

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One of a people known to the ancient Greeks from the earliest times, living in a perpetually warm and sunny land north of the source of the north wind.
• adjective Of or relating to the Hyperboreans.
• adjective Of or relating to the far north; Arctic.
• adjective Very cold; frigid.

from The Century Dictionary.

• Situated in or inhabiting the far north: as, the hyperborean regions; a hyperborean race; the hyperborean phalarope.
• Hence Very cold; frigid.
• [capitalized] Of or pertaining to the imaginary race of Hyperboreans.
• Arctic.
• noun [capitalized] An inhabitant of the most northern region of the earth.
• noun plural In ethnology, a group of arctic races.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Greek Myth.) One of the people who lived beyond the North wind, in a land of perpetual sunshine.
• noun An inhabitant of the most northern regions.
• adjective (Greek Myth.) Of or pertaining to the region beyond the North wind, or to its inhabitants.
• adjective Northern; belonging to, or inhabiting, a region in very far north; most northern; hence, very cold; fright, .

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun (Greek mythology) one of a people that the ancient Greeks believed lived in a warm and sunny land north of the source of the north wind