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.

(Of) the north polar regions

the area lying above 66 ½ degrees North latitude that includes the Arctic Ocean and lies between North America and Russia.

Northern section of the Earth's surface above arctic circle to the North Pole where ERB is polar bear hunting at the beginning of The Moon Men. [MMa