English Explanatory Dictionary

event horizon

English dictionary entry

Meanings

noun
  1. The gravitational sphere of a black hole within which the escape velocity is greater than the speed of light.
  2. The furthest distance in the past of the universe from which light signals from an event can reach an observer at later times.
  3. A point of no return.

Pronunciation

/əˈvɛnt həˈɹaɪ.zən/ /-zɪn/ [əˈvɛɾ̃ həˈɹaɪ.zən] [əˈvɛn -] [-zɪn] LL-Q1860 (eng)-Persent101-event horizon.wav

Word forms

event horizon event horizons

Related words

absolute horizon apparent horizon Cauchy horizon dynamical horizon isolated horizon Killing horizon particle horizon general relativity special relativity

Derived words

cosmic event horizon moral event horizon
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