Black Hole

Black hole

A black hole is an astronomical body so compact that its gravity prevents anything, including light, from escaping. Albert Einstein's theory of general relativity, which describes gravitation as the curvature of spacetime, predicts that any sufficiently compact mass will form a black hole. The boundary of no escape is called the event horizon. In general relativity, crossing a black hole's event horizon traps an object inside but produces no locally detectable change. General relativity also predicts that every black hole should have a central singularity, where the curvature of spacetime is infinite.

Black hole (networking)

In networking, a black hole or sinkhole is a place in the network where incoming or outgoing traffic is discarded or "dropped" without informing the source that the data did not reach its intended recipient. When examining the topology of the network, the black holes themselves are invisible, and can only be detected by monitoring the lost traffic. The name is presumed to have originated from the astronomical body or the hydrological feature (sinkhole).

Hole

A hole is an opening in or through a particular medium, usually a solid body. Holes occur through natural and artificial processes, and may be useful for various purposes, or may represent a problem needing to be addressed in many fields of engineering. Depending on the material and the placement, a hole may be an indentation in a surface, or may pass completely through that surface.

Black

Black is a color that results from the absence or complete absorption of visible light. It is an achromatic color, without chroma, like white and grey. It is often used symbolically or figuratively to represent darkness. Black and white have often been used to describe opposites such as good and evil, the Dark Ages versus the Age of Enlightenment, and night versus day. Since the Middle Ages, black has been the symbolic color of solemnity and authority, and for this reason it is still commonly worn by judges and magistrates.

black hole

Noun

1. A place of punitive confinement; a lockup or cell; a military guardroom. .mw-parser-output .defdate{font-size:smaller}
2. A region of spacetime that exerts a gravitational pull strong enough that no matter or energy, not even light, can escape it.

Verb

1. To redirect (network traffic, etc.) nowhere; to discard (incoming traffic).