black hole

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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