Polar (adjective)

1. Relating to or situated near one of the Earth's poles.
2. Relating to the North or South Pole.
3. Opposite in nature or characteristics; antithetical.
4. Relating to or having the characteristics of a magnet's poles.

Origin:

From latin polaris ("of or relating to the poles"), from polus ("pole").

Examples:

1. The polar bear is a powerful predator that lives in the Arctic.
2. The polar region is characterized by long, dark winters and short summers.
3. He had a polar opposite personality to his brother.
4. The two opinions were polar in nature.
5. The polar regions of a magnet are where the strongest magnetic fields are present.