1. having a pair of equal and opposite charges

Similar word(s): charged

2. characterized by opposite extremes; completely opposed

- extreme and indefensible polar positions

Similar word(s): different, diametric, diametrical, opposite

3. located at or near or coming from the earth's poles

- polar diameter

- polar zone

- a polar air mass

4. of or existing at or near a geographical pole or within the Arctic or Antarctic Circles

- polar regions

Similar word(s): circumpolar, arctic, antarctic

5. extremely cold

- polar weather

Similar word(s): cold, arctic, frigid, gelid, glacial, icy

6. being of crucial importance

- the polar events of this study

- a polar principal

Similar word(s): crucial, important, pivotal