from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A dungeon with a trapdoor in the ceiling as its only means of entrance or exit.
from the GNU version of the Collaborative International Dictionary of English
- n. A dungeon with an opening only at the top, found in some old castles and other strongholds, into which persons condemned to perpetual imprisonment, or to perish secretly, were thrust, or lured to fall.
from The Century Dictionary and Cyclopedia
- n. A secret dungeon with an opening only at the top for the admission of air, used for persons condemned to perpetual imprisonment or to perish secretly, such as exist in some old castles or other buildings.
- n. A secret pit, usually in the floor of a dungeon or a dark passage, into which a person could be precipitated and thus be destroyed unawares.
- To imprison in an oubliette.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a dungeon with the only entrance or exit being a trap door in the ceiling
French, from oublier, to forget, from Old French oblider, from Vulgar Latin *oblītāre, from Latin oblītus, past participle of oblīvīscī.(American Heritage® Dictionary of the English Language, Fourth Edition)
Borrowing from French oubliette, from oublier ("to forget"). (Wiktionary)