/ Dictionary / Index P polar front: Meaning and Definition of Find definitions for: po'lar front" Pronunciation: [key] the variable frontal zone of middle latitudes separating air masses of polar and tropical origin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polar equation Polari Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language