/ Dictionary / Index P polar bear: Meaning and Definition of Find definitions for: po'lar bear" Pronunciation: [key] a large white bear, Ursus maritimus, of the arctic regions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polar axis polar body Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language