Hence: Any real or imaginary place of restraint or confinement; a prison; as, to put a man in limbo.

A border or margin; as, the limbus of the cornea.

The visible borderline between the clear cornea and the white sclera of the eye. The conjunctival layer that covers the globe also joins at the limbus.

Border, hem, or fringe; a general term for the margins of certain structures, as in limbus vertebral factures.

Right atrial structure composing the thickened and elevated margin of the fossa ovalis

a border or edge of any of various body parts distinguished by color or structure

An spiritual region where certain classes of souls were supposed to await the last judgment.

A state of waiting, or uncertainty, in which final judgment concerning the outcome of a decision is postponed, perhaps indefinitely; neglect for an indefinite time; as, the proposal was left in limbo while opponents and proponents refused to compromise.