something that serves as a guiding principle.
something that is the center of attention or attraction.

Origin of polestar

First recorded in 1545–55; pole2 + star
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for polestar

Historical Examples of polestar

  • Was the polestar ever obscured by the interposition of a world in formation?

  • With this last link in a strange chain of evidence I close my diary of the voyage of the Polestar.

  • At night fix the dial so that the twelve o'clock line points exactly to north, as determined by the Polestar.

    Boy Scouts Handbook

    Boy Scouts of America

  • The polestar, which you tell me may be my guide, is often for a long time concealed by impenetrable clouds.

  • So that could well be the "Polestar" standing needle slim behind them—and not the notorious "Solar Queen."

    Plague Ship

    Andre Norton