/ Dictionary / Index C cold front: Meaning and Definition of Find definitions for: cold' front" Pronunciation: [key] the zone separating two air masses, of which the cooler, denser mass is advancing and replacing the warmer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cold frame cold fusion Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language