/ Dictionary / Index D Doon: Meaning and Definition of Find definitions for: Doon Pronunciation: (dn), [key] — n. a river in SW Scotland, flowing NW from Ayr County to the Firth of Clyde. ab. 30 mi. (48 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. doomster door Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language