Definition of "Polar" :
adjective: having a pair of equal and opposite charges
adjective: being of crucial importance
"The polar events of this study."
adjective: extremely cold
adjective: characterized by opposite extremes; completely opposed
"Extreme and indefensible polar positions."
adjective: of or existing at or near a geographical pole or within the Arctic or Antarctic Circles
adjective: located at or near or coming from the earth's poles