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black hole
1[ blak hohl ]
noun
- Astronomy. a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape.
- a deep, immeasurable space into which people or things vanish; an abyss:
I use earphones every day, but hate digging around for them in my black hole of a purse.
Black Hole
2[ blak hohl ]
noun
- Also called Black Hole of Cal·cut·ta [blak, , hohl, , uh, v kal-, kuht, -, uh]. a small prison cell in Fort William, Calcutta, in which, in 1756, Indians are said to have imprisoned 146 Europeans, only 23 of whom were alive the following morning.
- (lowercase) any usually wretched place of imprisonment or confinement.
black hole
noun
- an object in space so dense that its escape velocity exceeds the speed of light
- any place regarded as resembling a black hole in that items or information entering it cannot be retrieved
black hole
- An extremely dense celestial object whose gravitational field is so strong that not even light can escape from its vicinity. Black holes are believed to form in the aftermath of a supernova with the collapse of the star's core.
- See also event horizonSee more at star
black hole
- In astronomy , an object so massive that nothing, not even light , can escape its gravitation . Black holes were given their name because they absorb all the light that falls on them. The existence of black holes was first predicted by the general theory of relativity . Supermassive black holes have been found in the centers of many galaxies . Stellar black holes are thought to arise from the death of very massive stars . Astronomers expect to find many stellar black holes in the Milky Way .
Notes
Word History and Origins
Origin of black hole1
A Closer Look
Example Sentences
The government has said the move was necessary in order to address what it has called a financial "black hole" it inherited from the Conservatives.
But the Conservatives claimed Labour had left a "black hole" in council finances.
The night is always supposedly darkest before the dawn — and activists are now staring at a black hole seemingly larger than what they faced in 1994.
Sheringham Little Theatre said it faced a “black hole” in its finances following last week’s Budget, because of changes to employers' National Insurance contributions.
The government published a breakdown of how it had got from the Treasury's £9.5bn shortfall in February to the £22bn "black hole".
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