From Longman Dictionary of Contemporary Englishdungeondun‧geon /ˈdʌndʒən/ noun [countable] SCJa dark underground prison, especially under a castle, that was used in the past
Examples from the Corpus
dungeon• Gwen will be thinking I've been put in a dungeon.• It was like coming up out of a dungeon, Sandi decided.• Travellers stripped of their possessions and disappearing into castle dungeons, never to be heard of again.• Multi-player dungeons contain not only people but also bots-non-human programs that imitate people.• Adelaide refused and was thrown in the dungeon of a castle on Lake Garda.• A narrow stairwell wound like a corkscrew into the dungeons of the castle.• The door to the dungeon in which I had been living for a year was open.• Some nights he was dragged into a dark underground dungeon, where he would spend the night on the cold dirt floor.Origin dungeon (1300-1400) Old French donjon “central part of a castle”, from Latin dominus “lord” 