/ Dictionary / Index P polar circle: Meaning and Definition of Find definitions for: po'lar cir'cle Pronunciation: [key] either the Arctic or the Antarctic Circle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polar cap polar coordinates Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language