The Collaborative International Dictionary of English v.0.48:

Arctic \Arc"tic\, n.
   1. The arctic circle.
      [1913 Webster]

   2. A warm waterproof overshoe. [U.S.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Arctic \Arc"tic\, a. [OE. artik, OF. artique, F. arctique, L.
   arcticus, fr. Gr. ?, fr. ? a bear, also a northern
   constellation so called; akin to L. ursus bear, Skr. ?ksha.]
   Pertaining to, or situated under, the northern constellation
   called the Bear; northern; frigid; as, the arctic pole,
   circle, region, ocean; an arctic expedition, night,
   temperature.
   [1913 Webster]

   Note: The arctic circle is a lesser circle, parallel to the
         equator, 23[deg] 28' from the north pole. This and the
         antarctic circle are called the polar circles, and
         between these and the poles lie the frigid zones. See
         Zone.
         [1913 Webster]

WordNet (r) 3.0 (2006):

Arctic
    adj 1: of or relating to the Arctic; "the Arctic summer" [syn:
           north-polar, Arctic]
    2: extremely cold; "an arctic climate"; "a frigid day"; "gelid
       waters of the North Atlantic"; "glacial winds"; "icy hands";
       "polar weather" [syn: arctic, frigid, gelid, glacial,
       icy, polar]
    n 1: the regions to the north of the Arctic Circle centered on
         the North Pole [syn: Arctic, Arctic Zone, North Frigid
         Zone]
    2: a waterproof overshoe that protects shoes from water or snow
       [syn: arctic, galosh, golosh, rubber, gumshoe]

Moby Thesaurus II by Grady Ward, 1.0:

151 Moby Thesaurus words for "arctic":
   Siberian, aestival, affectless, algid, anesthetized, antarctic,
   austral, autistic, autumn, autumnal, below zero, biting, bitter,
   bitterly cold, bleak, blunt, boreal, brisk, brumal, canicular,
   catatonic, chill, chilly, cold, cold as charity, cold as death,
   cold as ice, cold as marble, cold-blooded, coldhearted, cool,
   crisp, cutting, dispassionate, drugged, dull, east, eastbound,
   easterly, eastermost, eastern, easternmost, emotionally dead,
   emotionless, equinoctial, freezing, freezing cold, frigid, frosted,
   frosty, frozen, gelid, glacial, heartless, hibernal, hiemal,
   hyperborean, ice-cold, ice-encrusted, icelike, icy, immovable,
   impassible, impassive, inclement, inexcitable, insusceptible, keen,
   meridional, midsummer, midwinter, nipping, nippy, nonemotional,
   north, northbound, northeast, northeasterly, northeastern,
   northerly, northern, northernmost, northwest, northwesterly,
   northwestern, numbing, objective, obtuse, occidental, oriental,
   out of season, out of touch, passionless, penetrating, piercing,
   pinching, raw, rigorous, seasonal, self-absorbed, severe, sharp,
   sleety, slushy, snappy, solstitial, soulless, south, southbound,
   southeast, southeasterly, southeastern, southerly, southern,
   southernmost, southwest, southwesterly, southwestern, spiritless,
   spring, springlike, stone-cold, subzero, summer, summerlike,
   summerly, summery, supercooled, unaffectionate, unemotional,
   unfeeling, unimpassioned, unimpressionable, unloving, unpassionate,
   unresponding, unresponsive, unsusceptible, unsympathetic,
   untouchable, vernal, west, westbound, westerly, western,
   westernmost, winter, winterbound, winterlike, wintery, wintry



The Free On-line Dictionary of Computing (30 December 2018):

Arctic

    A real-time functional language, used
   for music synthesis.

   ["Arctic: A Functional Language for Real-Time Control",
   R.B. Dannenberg, Conf Record 1984 ACM Symp on LISP and
   Functional Prog, ACM].

   (1995-01-16)