black hole
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.
Origin of black hole
1Other definitions for Black Hole (2 of 2)
Also called Black Hole of Cal·cut·ta [blak-hohluhv kal-kuht-uh] /ˈblæk ˈhoʊl əv kælˈkʌt ə/ . 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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use black hole in a sentence
These black holes are a type known as quasars: extremely massive objects that emit more light than the rest of the galaxy.
The observable Universe contains around 100 billion large galaxies and a comparable number of supermassive black holes.
The growth of black holes and galaxies are linked, though the details are still sketchy in places.
That leads us to wonder why galaxies and their black holes somehow “know” where they are in the cosmic web.
Now, a new observation seems to show that black holes also behave according to their place in the cosmic web.
In the walls of the ravines black holes gaped, for caves 303 were almost as numerous as springs.
A Virginia Scout | Hugh PendexterThe black-hole of that ship warn't a strong one, to a judge of black-holes that could swim and dive.
Great Expectations | Charles DickensIf we found that it made a regular trail, and led to one of these same black holes, we'd know more than we do right now.
The Boy Scouts' First Camp Fire | Herbert CarterHis small eyes were sunk deep in his head, showing like black holes in the heavy, flat, hairless face.
The Last of the Legions and Other Tales of Long Ago | Arthur Conan DoyleThere were scores of just similar ragged black holes among the tumbled rocks of the great wall.
A Maid of the Silver Sea | John Oxenham
British Dictionary definitions for black hole
/ astronomy /
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for 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 horizon. See more at star.
a closer look
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for 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 for black hole
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Other Idioms and Phrases with black hole
A wretched prison cell or other place of confinement. For example, The punishment is solitary confinement, known as the black hole. This term acquired its meaning in 1756 with the event known as the Black Hole of Calcutta. On the night of June 20, the ruler of Bengal confined 146 Europeans in a prison space of only 14 by 18 feet. By morning all but 23 of them had suffocated to death. Although historians since have questioned the truth of the story, it survives in this usage.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
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