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polar (adj.)

1550s, "from or found in the regions near the poles of the Earth," from French polaire (16c.) or directly from Medieval Latin polaris "of or pertaining to the poles," from Latin polus "an end of an axis" (see pole (n.2)). By 1816 as "of or pertaining to a pole or poles of a sphere." Meaning "directly opposite in character or tendency" is attested from 1832. Polar bear is attested from 1781.

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Definitions of polar from WordNet

polar (adj.)
characterized by opposite extremes; completely opposed;
extreme and indefensible polar positions
Synonyms: diametric / diametrical / opposite
polar (adj.)
having a pair of equal and opposite charges;
polar (adj.)
located at or near or coming from the earth's poles;
Antarctica is the only polar continent
polar zone
a polar air mass
polar diameter
polar (adj.)
of or existing at or near a geographical pole or within the Arctic or Antarctic Circles;
polar regions
polar (adj.)
extremely cold;
polar weather
Synonyms: arctic / frigid / gelid / glacial / icy
polar (adj.)
being of crucial importance; "Its pivotal location has also exposed it to periodic invasions"- Henry Kissinger;
the polar events of this study
a polar principal
Synonyms: pivotal
From wordnet.princeton.edu