adj.
Extremely cold; frigid. See synonyms at cold.
n.
A warm waterproof overshoe.
[Alteration (influenced by Latin arcticus) of Middle English artic, northern, from Medieval Latin articus, from Latin arcticus, from Greek arktikos, from arktos, bear, the northern constellation Ursa Major.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.