/ Dictionary / Index D Dumbarton: Meaning and Definition of Find definitions for: Dum•bar•ton Pronunciation: (dum-bär'tn), [key] Also calleda historic county in W Scotland. a city in W Scotland, near the Clyde River: shipbuilding. 80,105. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dumb ague Dumbarton Oaks Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language