/ Dictionary / Index B BBB: Meaning and Definition of Find definitions for: BBB Pronunciation: [key] See BBB Pronunciation: [key] a quality rating for a corporate or municipal bond, lower than A and higher than BB. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. B battery B.B.C. Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language