/ Dictionary / Index E echo chamber: Meaning and Definition of Find definitions for: ech'o cham"ber Pronunciation: [key] a room or studio with resonant walls for broadcasting or recording echoes or hollow sound effects. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. echocardiograph echoencephalogram Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language