/ Dictionary / Index D dungeon: Meaning and Definition of Find definitions for: dun•geon Pronunciation: (dun'jun), [key] — n. a strong, dark prison or cell, usually underground, as in a medieval castle. the keep or stronghold of a castle; donjon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dungeon (Thesaurus) Dungeness crab Dungeons and Dragons Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language