adj.1. a. Of or relating to a pole.
b. Measured from or referred to a pole: polar distance; polar diameter.
2. Relating to, connected with, or located near the North Pole or South Pole.
3. a. Passing over a planet's north and south poles: a polar orbit.
b. Traveling in an orbit that passes over a planet's north and south poles.
4. Serving as a guide, as a polestar or a pole of the earth.
5. Occupying or characterized by opposite extremes: "In creative territory [they] make a strange yet ineluctable couple, more complementary, even polar, than twin-like" (Josh Rubins).
6. Central or pivotal.
7. a. Chemistry Relating to or characterized by a dipole: a polar molecule.
b. Ionizing when dissolved or fused: polar bonds or linkages.