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lodestar

noun [S]
 
 
/ˈləʊd.stɑːr/ US  /ˈloʊd.stɑːr/

Definition

a star, especially the Pole Star, used to help find directionNavigation and shipwrecksStars and constellations literary an example or principle that people want to follow: The party manifesto is no longer the lodestar it used to be.Samples and examples
(Definition of lodestar noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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