Meaning of “polar” in the English Dictionary

"polar" in American English

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us /ˈpoʊ·lər/

polar adjective (OF A PLACE)

[ not gradable ] of or near the area around the most northern or most southern points of the earth:

the polar ice cap
a polar expedition

polar adjective (OF ELECTRICITY)

relating to either of the two ends of a magnet or two parts of a battery (= device that produces electricity) which have opposite charges:

fig. The play’s main characters are polar opposites (= They are completely opposite).

chemistry Polar also describes a substance whose molecules have opposite positive and negative poles

(Definition of “polar” from the Cambridge Academic Content Dictionary © Cambridge University Press)