A dungeon with a trapdoor when you look at the ceiling as its just means of entrance or exit.
a dungeon with an orifice only at the top, within some old castles also strongholds, into which individuals condemned to perpetual imprisonment, or to perish privately, had been pushed, or lured to fall.
A secret cell with an opening just at the top when it comes to admission of air, utilized for individuals condemned to perpetual imprisonment or even to perish secretly, such as for instance exist in a few old castles or any other buildings.
A secret gap, usually inside floor of a dungeon or a dark passage, into which people could possibly be precipitated and therefore be destroyed unawares.
a dungeon with the just entry or exit being a trap door in ceiling