/ Dictionary / Index D decibar: Meaning and Definition of Find definitions for: dec•i•bar Pronunciation: (des'u-bär"), [key] — n. Physics. a centimeter-gram-second unit of pressure, equal to bar or 100,000 dynes per square centimeter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. deci- decibel Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language