event horizon
noun
: the surface of a black hole : the boundary of a black hole beyond which nothing can escape from within it
Examples of event horizon in a Sentence
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Many of Gore’s predictions center on a half-century event horizon, but not even halfway to that point, many of the forecasts have already come true.
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Steven Zeitchik, HollywoodReporter, 22 Apr. 2026
Like all black holes, primordial black holes have mass and thus interact with gravity and are effectively invisible due to the fact that they are bounded by a light-trapping surface called an event horizon.
—Robert Lea, Space.com, 10 Apr. 2026
Quantum mechanics essentially causes a black hole to emit energy in the form of light just outside the event horizon.
—Phil Plait, Scientific American, 27 Mar. 2026
The difference in what the vacuum state is in different regions of space — particularly in the presence of a horizon, whether a cosmological or an event horizon — leads to the production of radiation and particle-antiparticle pairs wherever quantum fields are present.
—Big Think, 24 Mar. 2026
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Steven Zeitchik, HollywoodReporter, 22 Apr. 2026
Like all black holes, primordial black holes have mass and thus interact with gravity and are effectively invisible due to the fact that they are bounded by a light-trapping surface called an event horizon.
—Robert Lea, Space.com, 10 Apr. 2026
Quantum mechanics essentially causes a black hole to emit energy in the form of light just outside the event horizon.
—Phil Plait, Scientific American, 27 Mar. 2026
The difference in what the vacuum state is in different regions of space — particularly in the presence of a horizon, whether a cosmological or an event horizon — leads to the production of radiation and particle-antiparticle pairs wherever quantum fields are present.
—Big Think, 24 Mar. 2026
See All Example Sentences for event horizon
Cite this Entry
“Event horizon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/event%20horizon. Accessed 30 Apr. 2026.
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