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 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 Meanwhile, if the accelerating expansion of the universe continues unabated, all other galaxies will disappear beyond our cosmic event horizon, leaving Milkomeda as the sole occupant of the visible universe. Bydaniel Clery, science.org, 9 Aug. 2024 Like the prime meridian, the event horizon is an illusion: a mathematical artifact called a coordinate singularity, which only arises because of the choice of coordinates. Steve Nadis, Quanta Magazine, 31 May 2024 See all Example Sentences for event horizon 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'event horizon.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 5 Nov. 2024.

Last Updated: - Updated example sentences
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