as in immediate
done or occurring without any noticeable lapse in time
the thunder following the flash of lightning was nearly instantaneous
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Recent Examples of instantaneous
The position, size and type of injury hinted at a small but fast-moving object; a larger object would have caused more serious damage, and death probably would have been instantaneous, the study authors reported.
—
Mindy Weisberger, CNN Money, 29 Aug. 2025
But, even in our current age of instantaneous information exchange, this dynamic remains highly recognizable.
—Jon Allsop, New Yorker, 29 Aug. 2025
While greenhouse gasses released into the atmosphere can linger for years, once air pollution is reduced the health benefits are nearly instantaneous.
—Simmone Shah, Time, 22 Aug. 2025
The effects felt almost instantaneous, and now steak night has become a monthly staple in the diary.
—Alyce Collins, MSNBC Newsweek, 25 July 2025
See All Example Sentences for instantaneous
Mindy Weisberger, CNN Money, 29 Aug. 2025
But, even in our current age of instantaneous information exchange, this dynamic remains highly recognizable.
—Jon Allsop, New Yorker, 29 Aug. 2025
While greenhouse gasses released into the atmosphere can linger for years, once air pollution is reduced the health benefits are nearly instantaneous.
—Simmone Shah, Time, 22 Aug. 2025
The effects felt almost instantaneous, and now steak night has become a monthly staple in the diary.
—Alyce Collins, MSNBC Newsweek, 25 July 2025
See All Example Sentences for instantaneous
Recent Examples of Synonyms for instantaneous
Adjective
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WellSpace has an immediate care program that can offer brief visits for people who must be seen right away, but full-service visits with providers may begin to take longer.—
Sacbee.com,
Sacbee.com,
25 Sep. 2025
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This outcome has immediate repercussions.—
Keith Phipps,
Vulture,
25 Sep. 2025
Adjective
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Priano Butternut Squash Ravioli An instant fall upgrade to your favorite weeknight dinner is a seasonal pasta shape.—
Abigail Wilt,
Southern Living,
1 Oct. 2025
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This is no longer about instant gratification but rather setting yourself up for a long-term payoff by making small (aligned) changes.—
Meghan Rose,
Glamour,
1 Oct. 2025
Cite this Entry
“Instantaneous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/instantaneous. Accessed 2 Oct. 2025.
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