dungeonnounfeminine/mɐʒˈmoʁɐ/lowmas·mor·raPortuguesEnglishEspanolFrancaisDefinitionA dark, underground, and often unhealthy prison, typically in a castle or fortress.The knight was thrown into the castle's dungeon.Medieval dungeons were dreadful places.synoubliettekeepCommon collocationscastle dungeondark dungeonto throw into a dungeonEtymologyDo árabe 'al-matmura' (prisão subterrânea).