/ Dictionary / Index C cliff brake: Meaning and Definition of Find definitions for: cliff' brake" Pronunciation: [key] any of several common ferns of the genus Pellaea, usually growing in pockets of thin soil on rocks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cliff cliff dweller Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language