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
Around the watercooler Resurgent air travel and a strategic acquisition helped SATS climb over 100 places in the Southeast Asia 500 by Lionel Lim
Past the event horizon?
—
Diane Brady, Fortune, 20 June 2025
And, once a supermassive black hole gets big enough, its event horizon is so far out that stars can pass through it before they get disrupted, and all the energetic release would take place inside the black hole.
—ArsTechnica, 9 May 2025
These infant universes are protected from investigation by the event horizon of their parent black holes, which prevents any signal from being received from the interior of a black hole.
—Robert Lea, Space.com, 21 June 2025
Black hole cosmology suggests that every black hole creates a new baby universe on the other side of its event horizon, the one-way light-trapping surface that defines the outer boundary of a black hole.
—Robert Lea, Space.com, 21 June 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.
Diane Brady, Fortune, 20 June 2025
And, once a supermassive black hole gets big enough, its event horizon is so far out that stars can pass through it before they get disrupted, and all the energetic release would take place inside the black hole.
—ArsTechnica, 9 May 2025
These infant universes are protected from investigation by the event horizon of their parent black holes, which prevents any signal from being received from the interior of a black hole.
—Robert Lea, Space.com, 21 June 2025
Black hole cosmology suggests that every black hole creates a new baby universe on the other side of its event horizon, the one-way light-trapping surface that defines the outer boundary of a black hole.
—Robert Lea, Space.com, 21 June 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 24 Jul. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share