Definition of black hole noun from the Oxford Advanced Learner's Dictionary

 

black hole

 noun
noun
BrE
 
; NAmE
 
The universe
 
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an area in space that nothing, not even light, can escape from, because gravity (= the force that pulls objects in space towards each other) is so strong there (figurative) The company viewed the venture as a financial black hole (= it would use a lot of the company's money with no real result). (figurative) Thousands of people have been plunged into the black hole of unemployment. See related entries: The universe
See the Oxford Advanced American Dictionary entry: black hole

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