Definition of hyperboreans:
(adj) :
Pertaining to the extreme north of the earth; or (usually humorous) to a specific northern country or area.
(n) :
(usually humorous) Any person living in a northern country, or to the north.
(n) :
(Greek mythology, usually capitalised) One of a race of people living in the extreme north, beyond the north wind.
(n) :
Alternative letter-case form of hyperborean. [(Greek mythology, usually capitalised) One of a race of people living in the extreme north, beyond the north wind.]