/ Dictionary / Index R reverberation time: Meaning and Definition of Find definitions for: reverbera'tion time" Pronunciation: [key] the time it takes for a sound made in a room to diminish by 60 decibels. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. reverberation reverberatory Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language