POLARIS

Polaris, North Star, pole star, polar star, polestar

(noun) the brightest star in Ursa Minor; at the end of the handle of the Little Dipper; the northern axis of the earth points toward it

Source: WordNet® 3.1

Po*la"ris, n. Etym: [NL. See Polar.] (Astron.)

Definition: The polestar. See North star, under North.

Source: Webster’s Unabridged Dictionary 1913 Edition