From The Collaborative International Dictionary of English v.0.48 [gcide]:
Note: The limbus patrum was considered as a place for the souls of good men who lived before the coming of our Savior. The limbus infantium was said to be a similar place for the souls of unbaptized infants. To these was added, in the popular belief, the limbus fatuorum, or fool's paradise, regarded as a receptacle of all vanity and nonsense.
3. Hence: 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. [PJC]
From WordNet (r) 3.0 (2006) [wn]:
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Eye and Pyramid BANKING REFORM CHALLENGE