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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Black holes are black because anything falling into them makes a one-way trip, after all; nothing, not even light, can escape once inside a black hole’s event horizon, its point of no return.
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Phil Plait, Scientific American, 13 Feb. 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
In the new framework, information is not destroyed at the event horizon.
—Rupendra Brahambhatt, Interesting Engineering, 17 Jan. 2026
The amplitude of gravitational waves arising dense masses (black holes and/or neutron stars) inspiraling into a low-mass black hole’s event horizon is the greatest in the known Universe.
—Big Think, 7 Nov. 2025
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Phil Plait, Scientific American, 13 Feb. 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
In the new framework, information is not destroyed at the event horizon.
—Rupendra Brahambhatt, Interesting Engineering, 17 Jan. 2026
The amplitude of gravitational waves arising dense masses (black holes and/or neutron stars) inspiraling into a low-mass black hole’s event horizon is the greatest in the known Universe.
—Big Think, 7 Nov. 2025
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 23 Feb. 2026.
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