/ Dictionary / Index B Big D: Meaning and Definition of Find definitions for: Big D Pronunciation: [key] — Informal. Informal. Dallas, Texas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. big-cone pine big daddy Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language