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polestar

[pohl-stahr]
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noun
  1. Polaris.
  2. something that serves as a guiding principle.
  3. something that is the center of attention or attraction.
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Origin of polestar

First recorded in 1545–55; pole2 + star
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for pole star

pole star

noun
  1. a guiding principle, rule, standard, etc
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Pole Star

noun
  1. the Pole Star the star closest to the N celestial pole at any particular time. At present this is Polaris, but it will eventually be replaced by some other star owing to precession of the earth's axis
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012