What is the meaning of Dungeon?

An underground prison or vault, typically built underneath a castle.

The low area between two drumlins.

The main tower of a motte or castle; a keep or donjon.

A shrewd person.

An area inhabited by enemies, containing story objectives, treasure, and bosses.

A room dedicated to sadomasochistic sexual activity.

To imprison in a dungeon.

Alternative form of dongeoun

Source: wiktionary.org