1A fairly bright star located within one degree of the celestial north pole, in the constellation Ursa Minor. It is a triple star, the bright component of which is a cepheid variable.

1. 1.1as noun a pole star A thing or principle that guides or attracts people.
   〈喻〉指引，指导原则，指南；有吸引力的东西
   the store is a pole star for both actual and armchair travelers

   这家商店指引着真正旅行者和足不出户的幻想旅行者。