event horizon

noun

Meaning

The gravitational sphere of a black hole within which the escape velocity is greater than the speed of light.
(by extension) A point of no return.

Etymology / origin

No prose etymology has been added yet.

No ancestor words have been linked yet.

Related words

ergosphere(English)photon sphere(English)last photon orbit(English)escape velocity(English)hypervelocity(English)white hole(English)schwarzschild radius(English)firewall(English)

Descendant words

No descendant words have been linked yet.

Sources

DictionaryAPI.dev English dictionary data