Definition of "polestar" [pole•star]

• See Polaris. (noun)
• A guiding principle. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "True though it is that Roy Cohn was an unsavory piece of work, what do we learn about him from being told by Louis that he is "a polestar of human evil … the worst human being who ever lived"?"
• "In ancient Vedic wisdom, the polestar is literally Dhruva—a prince who, at age seven, sought out God."
• "Hinduism, Taoism, Chinese popular religion, Siberian shamanism, and other spiritual traditions speak of a polestar."