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 Some models even map the electron behavior to the physics of event horizons around black holes. Douglas Natelson, Scientific American, 19 Mar. 2024 The alternate simulation shows a viewer orbiting close to the event horizon but escaping to safety before ever crossing it. Eric Lagatta, USA TODAY, 7 May 2024 In the meantime, simulations released Monday instead simply imagine what a person may see while plummeting toward a black hole's event horizon to their inevitable death. Eric Lagatta, USA TODAY, 7 May 2024 The simulated black hole's event horizon is about 16 million miles wide, and viewers will see a large flat cloud of hot gas and glowing structures called photon rings. Kerry Breen, CBS News, 7 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 4 Jul. 2024.

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