/ Dictionary / Index D d/b/a: Meaning and Definition of Find definitions for: d/b/a Pronunciation: [key] doing business as. DBA Pronunciation: [key] doing business as. dBa Pronunciation: [key] decibels above reference noise, adjusted. D.B.A. Pronunciation: [key] Doctor of Business Administration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dba (Thesaurus) dB D.B.E. Related Content Daily Word Quiz: candid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language