/ Dictionary / Index P polar lights: Meaning and Definition of Find definitions for: po'lar lights' Pronunciation: [key] the aurora borealis in the Northern Hemisphere or the aurora australis in the Southern Hemisphere. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polarizing microscope polar molecule Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language