polestar

pole·star

P0410500 (pōl′stär′)n.1. See Polaris.2. A guiding principle.

pole•star

(ˈpoʊlˌstɑr)

n. 1. Polaris. 2. something that serves as a guiding principle. [1545–55]

Thesaurus

Noun

1.

polestar - the brightest star in Ursa Minor; at the end of the handle of the Little Dipper; the northern axis of the earth points toward itNorth Star, polar star, Polaris, pole starLittle Bear, Ursa Minor - a constellation outside the zodiac that rotates around the North StarLittle Dipper, Dipper - a cluster of seven stars in Ursa Minor; at the end of the dipper's handle is Polaris