arctic

Short definition from Wiktionary

Adjective

1. 1
   Alternative letter-case form of Arctic.
2. 2
   Pertaining to the celestial north pole, or to the pole star.
3. 3
   Pertaining to the northern polar region of the planet, characterised by extreme cold and an icy landscape.
4. 4
   Extremely cold, snowy, or having other properties of extreme winter associated with the Arctic.
5. 5
   Designed for use in very cold conditions.

Noun

1. 1
   Alternative letter-case form of Arctic.
2. 2
   A warm waterproof overshoe.
3. 3
   Any of various butterflies of the genus Oeneis.

Proper noun

1. 1
   The north celestial pole.
2. 2
   A continental region consisting of the portion of the Earth north of the Arctic Circle, containing the North Pole.