noun
a star, especially the North Star, used as a point of reference or guidance
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The polestar, also known as Polaris, is the brightest star in the constellation Ursa Minor.
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If you ever get lost at night, just look for the polestar - it will guide you north.
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That new restaurant is the polestar of the neighborhood right now, everyone is talking about it.
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In her journey to success, hard work and determination were her polestars guiding her along the way.