Definition of Polar

Adjective: polar pow-lu(r)

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