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