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
Any matter, light, or radiation crossing the edge of this trap, known as the event horizon, disappears forever.
—
IEEE Spectrum, 30 Jan. 2020
That led physicists to believe that the event horizon was a physical singularity.
—Steve Nadis, Quanta Magazine, 31 May 2024
To preclude the increase of entropy, this process would have to break the entanglement between the particle pairs across the event horizon.
—Ahmed Almheiri, Scientific American, 1 Sep. 2022
Now, the white dwarf might be orbiting within millions of miles of the black hole’s event horizon—the point beyond which no matter or light can escape.
—Sara Hashemi, Smithsonian Magazine, 14 Jan. 2025
See all Example Sentences for event horizon 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
IEEE Spectrum, 30 Jan. 2020
That led physicists to believe that the event horizon was a physical singularity.
—Steve Nadis, Quanta Magazine, 31 May 2024
To preclude the increase of entropy, this process would have to break the entanglement between the particle pairs across the event horizon.
—Ahmed Almheiri, Scientific American, 1 Sep. 2022
Now, the white dwarf might be orbiting within millions of miles of the black hole’s event horizon—the point beyond which no matter or light can escape.
—Sara Hashemi, Smithsonian Magazine, 14 Jan. 2025
See all Example Sentences for event horizon
Articles Related to event horizon
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 21 Feb. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share