Black-hole definition

A massive star in the last phase of its evolution, in which the star collapses, creating a volume of space-time with a gravitational field so intense that its escape velocity equals or exceeds that of light.
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The definition of a black hole is a dark place in space, or an emptiness.

An example of a black hole is a dark place in outer space possibly formed by a collapsed star.

An example of a black hole is a void in someone's heart.

An example of a black hole is a small, underground prison cell.

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A great void; an abyss.

The government created a bureaucratic black hole that swallows up individual initiative.

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A celestial object or dark region in space, perhaps formed by the collapse of a large star, with such a great mass that its gravitational field will not let even light escape.
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An emptiness or void.
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Anything thought of as endlessly devouring resources, funds, etc.
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(place, proper) A small dungeon at Calcutta: it was once believed that over 100 Europeans were confined there one night in 1756 by their Indian captors and died from heat and lack of air.
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Any dungeon.
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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.
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A black hole is a region in the Internet not reachable from anywhere else. Black Holes typically result from configuration errors or attacks to the routers that attach the black-holed area to the Internet.
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A gravitationally domineering celestial body with an event horizon from which even light cannot escape; the most dense material in the universe, condensed into a singularity, usually formed by a collapsing massive star.
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A sphere of influence into which or from which communication or similar activity is precluded.
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An entity which consumes time or resources without demonstrable utility.
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A dungeon or dark cell in a prison; a military lock-up or guardroom.
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Attributive form of black hole, noun.

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Other Word Forms

Noun

Singular:
black-hole
Plural:
black-holes