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

Recent Examples on the Web
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To support their claim, the trio argued that any process that would allow a black hole’s charge or spin to reach the extremal limit could also potentially result in its event horizon disappearing altogether. Steve Nadis, WIRED, 15 Sep. 2024 It is widely believed that black holes without an event horizon, called naked singularities, cannot exist. Steve Nadis, WIRED, 15 Sep. 2024 So recently, now the event horizon of abject failure is upon the London Stock Exchange where the CEO of the exchange itself is not even on the board of the London Stock Exchange Group, the word is out that the London market needs rejuvenating. Clem Chambers, Forbes, 23 Sep. 2024 That is until the bacteria crosses the equivalent of an event horizon, where the flow becomes fast enough to sweep away communication signals too. The Physics Arxiv Blog, Discover Magazine, 17 Sep. 2024 See all Example Sentences for event horizon 

Word History

First Known Use

1956, in the meaning defined above

Time Traveler
The first known use of event horizon was in 1956

Dictionary Entries Near event horizon

Cite this Entry

“Event horizon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/event%20horizon. Accessed 25 Dec. 2024.

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