noun
An underground prison or vault, typically built underneath a castle.
The low area between two drumlins.
(obsolete) The main tower of a motte or castle; a keep or donjon.
(obsolete) A shrewd person.
(roleplaying games) An area inhabited by enemies, containing story objectives, treasure, and bosses.
(BDSM) A room dedicated to sadomasochistic sexual activity.
verb
(transitive) To imprison in a dungeon.