black hole


Also found in: Thesaurus, Financial, Acronyms, Idioms, Encyclopedia, Wikipedia.

black hole

n.
1. A massive star in the last phase of its evolution, in which the star collapses, creating a volume of spacetime with a gravitational field so intense that its escape velocity equals or exceeds that of light.
2. A great void; an abyss: The government created a bureaucratic black hole that swallows up individual initiative.

black hole

n
1. (Astronomy) an object in space so dense that its escape velocity exceeds the speed of light
2. any place regarded as resembling a black hole in that items or information entering it cannot be retrieved

black′ hole′


n.
1. 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.
2. a void into which things vanish permanently.
[1965–70]

black hole

An extremely dense celestial object that has a gravitational field so strong that nothing can escape, not even light. A black hole is formed by the collapse of a massive star's core in a supernova. See more at star.
Did You Know? One of the strangest objects in the universe is the burnt-out remnant of a large star, known as a black hole. The name comes from the fact that the star collapses into itself, becoming so dense that its gravitational pull keeps even light from escaping. And if light can't get out, then nothing that ever enters the black hole would ever escape. Rockets to the moon or Mars need to achieve what is called escape velocity, the speed necessary to overcome the Earth's gravity. But since nothing can ever go faster than the speed of light, nothing could ever go fast enough to reach the escape velocity necessary to pull out of a black hole. Here's how dense a black hole is: the sun has a diameter of about 864,000 miles (1,391,000 kilometers); for it to be as dense as a black hole, its entire mass would have to be squeezed down to a ball less than two miles across.

black hole

An object with large mass but small size, from which no light can escape; formed in the first moments in the life of the universe. Also called a collapsar.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.black hole - a region of space resulting from the collapse of a starblack hole - a region of space resulting from the collapse of a star; extremely high gravitational field
region, part - the extended spatial location of something; "the farming regions of France"; "religions in all parts of the world"; "regions of outer space"
Translations
černá díra
schwarzes Loch
must auk
musta aukko
חור שחור
svarthol
ブラックホール
zwart gat
sort hullsvart hull
czarna dziura
svart hål
kara delik
hố đen

black hole

n (Astron) → buco nero
References in classic literature ?
Out of the square black hole in the middle of the floor protruded the head of the departed Chinaman, his glassy eyes turned upward in their angular slits and fastened on the dangling queue above with a look of yearning unspeakable.
The cell, or black hole, for it had those words painted on the door, was very dark, and having recently accommodated a drunken deserter, by no means clean.
Upon that, he pulled out a napkin, as if it were a magic clue without which he couldn't find the way up-stairs, and led us to the black hole of the establishment: fitted up with a diminishing mirror (quite a superfluous article considering the hole's proportions), an anchovy sauce-cruet, and somebody's pattens.
Wrapping the tiny body in a blanket, Jane laid it tenderly in the black hole, and, turning her head that she might not see the mouldy earth falling upon the pitiful little bundle, she breathed a prayer beside the grave of the nameless waif that had won its way to the innermost recesses of her heart.
It was the Black Hole of Calcutta on a small scale.
Approaching one of the openings he leaned over the black hole and, listened for sounds of life in the apartment below.
The Black Hole of Calcutta must have been a fool to it; indeed, to this moment I do not know how we lived through the day.
Long did the travelers stand mute, watching the constellated firmament, upon which the moon, like a vast screen, made an enormous black hole.
For a moment Ossipon imagined the overlighted place changed into a dreadful black hole belching horrible fumes choked with ghastly rubbish of smashed brickwork and mutilated corpses.
A black hole yawned beneath into which we all peered, while Musgrave, kneeling at the side, pushed down the lantern.
Just ahead of him in the roof of the aqueduct was a round, black hole about thirty inches in diameter.
The entrance to the farther forest looked small and round, like the black hole of a remote railway tunnel.

Full browser ?