dungeon dungbred • dungeoner · · · Info · Definitions · Synonyms · Characters · · dungeon · · Text Latin · · Script 7 · · Length Definitions · · · (noun) the main tower within the walls of a medieval castle or fortress. Synonyms: keep, donjon. · · Noun Definition 1 (noun) a dark cell (usually underground) where prisoners can be confined. · · Noun Definition 2 Synonyms · · · keep · · Synonym 1 donjon · · Synonym 2 Characters · · d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 n latin small letter n U+006E o latin small letter o U+006F u latin small letter u U+0075