black hole
noun [C]Definition
› COMMERCE an activity or organization on which very large amounts of money are spent but which does not produce any profit or useful result: Fears that the operation would be a black hole proved well-founded.
› FINANCE, ACCOUNTING a large amount of money that is owed by a company or government: black hole in sth Taxes will have to rise to fill a black hole in the public finances.
(Definition of black hole noun from the Cambridge Business English Dictionary
© Cambridge University Press)
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