polar (Adjective) — Having a pair of equal and opposite charges.
polar (Adjective) — Characterized by opposite extremes; completely opposed. ex. "polar points of view" ex. "extreme and indefensible polar positions"
polar (Adjective) — Located at, near or coming from the earth's poles. ex. "polar diameter" ex. "polar zone" ex. "a polar air mass" ex. "Antarctica is the only polar continent"
polar (Adjective) — Of or existing at or near a geographical pole or within the Arctic or Antarctic Circles. ex. "polar regions"
polar (Adjective) — Extremely cold. ex. "polar weather"
polar (Adjective) — Being of crucial importance. ex. "the polar events of this study" ex. "a polar principal"