dungeon

Definition of Dungeon in English :

1. donjon, dungeon, keep

the main tower within the walls of a medieval castle or fortress

2. dungeon

a dark cell (usually underground) where prisoners can be confined

WordNet Lexical Database for English. Princeton University. 2010.

Dungeon

noun

1.

a close prison cell, often underground

2. a variant of donjon

noun

1.

donjon

2.

a dark underground cell, vault, or prison

verb transitive

3. Rare

to confine in a dungeon

n.

1. A dark, often underground chamber used to confine prisoners.

2. A donjon.