/ Dictionary / Index D Dismal Swamp: Meaning and Definition of Find definitions for: Dis'mal Swamp' Pronunciation: [key] a swamp in SE Virginia and NE North Carolina. ab. 30 mi. (48 km) long; ab. 600 sq. mi. (1500 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dismal dismantle Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language