/ Dictionary / Index D Diamond Bar: Meaning and Definition of Find definitions for: Dia'mond Bar' Pronunciation: [key] a city in SW California. 28,045. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diamondback terrapin diamond bird Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language