instantaneous
adjective
in·stan·ta·neous
ˌin(t)-stən-ˈtā-nē-əs 
-nyəs
1
: done, occurring, or acting without any perceptible duration of time
death was instantaneous
2
: done without any delay being purposely introduced
took instantaneous corrective action
3
: occurring or present at a particular instant
instantaneous velocity
instantaneousness
noun
Examples of instantaneous in a Sentence
We got an almost instantaneous response from the company.
the thunder following the flash of lightning was nearly instantaneous
Recent Examples on the Web
That's the benefit of electric power providing instantaneous torque.
—
Eileen Falkenberg-Hull, MSNBC Newsweek, 16 July 2025
Of course, getting over his nerves on the set of Karate Kid: Legends wasn’t instantaneous.
—Tim Lammers, Forbes.com, 15 July 2025
Best of all, the effect is both instantaneous and long-term.
—Violeta Valdés, Vogue, 5 July 2025
The skies don’t darken in warning and the danger isn’t instantaneous, like a gunshot.
—Thomas E. Weber, Time, 6 June 2025
See All Example Sentences for instantaneous
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Eileen Falkenberg-Hull, MSNBC Newsweek, 16 July 2025
Of course, getting over his nerves on the set of Karate Kid: Legends wasn’t instantaneous.
—Tim Lammers, Forbes.com, 15 July 2025
Best of all, the effect is both instantaneous and long-term.
—Violeta Valdés, Vogue, 5 July 2025
The skies don’t darken in warning and the danger isn’t instantaneous, like a gunshot.
—Thomas E. Weber, Time, 6 June 2025
See All Example Sentences for instantaneous
Cite this Entry
“Instantaneous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/instantaneous. Accessed 29 Jul. 2025.
Copy CitationKids Definition
instantaneous
adjective
in·stan·ta·neous
ˌin(t)-stən-ˈtā-nē-əs
-nyəs
1
: happening in an instant
2
: done without delay
instantaneously
adverb
instantaneousness
noun
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