Limbus

1. n. A border or margin; as, the limbus of the cornea.
2. n. An extramundane region where certain classes of souls were supposed to await the judgment.
3. n. Hence: Any real or imaginary place of restraint or confinement; a prison; as, to put a man in limbo.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.