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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Quantum mechanics essentially causes a black hole to emit energy in the form of light just outside the event horizon.
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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
This crystal ball may be like a black hole with an event horizon, past which the light of its insight cannot escape.
—Ross Andersen, The Atlantic, 11 Feb. 2026
There’s an event horizon around all Beyoncé marquees, so the Destiny’s Child reunion was a limited-edition moment within a moment.
—Steven Louis Goldstein, New York Times, 30 Jan. 2026
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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
This crystal ball may be like a black hole with an event horizon, past which the light of its insight cannot escape.
—Ross Andersen, The Atlantic, 11 Feb. 2026
There’s an event horizon around all Beyoncé marquees, so the Destiny’s Child reunion was a limited-edition moment within a moment.
—Steven Louis Goldstein, New York Times, 30 Jan. 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 7 Apr. 2026.
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