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 result for many people in the reviews has been instantaneous, only taking one night to notice the difference.
—
Stephanie Osmanski, Better Homes & Gardens, 25 Feb. 2026
Criminals would seek payments in Bitcoin in part because the transactions are instantaneous.
—Carlos Garcia, Fortune, 17 Feb. 2026
And in an era of viral video and instantaneous judgement, the court of public opinion often convenes long before all the evidence is in.
—Denise Crosby, Chicago Tribune, 15 Feb. 2026
Not every match is instantaneous, but countless adopters describe that immediate spark that turns into a lifelong bond.
—Cathy M. Rosenthal, San Antonio Express-News, 10 Feb. 2026
See All Example Sentences for instantaneous
Stephanie Osmanski, Better Homes & Gardens, 25 Feb. 2026
Criminals would seek payments in Bitcoin in part because the transactions are instantaneous.
—Carlos Garcia, Fortune, 17 Feb. 2026
And in an era of viral video and instantaneous judgement, the court of public opinion often convenes long before all the evidence is in.
—Denise Crosby, Chicago Tribune, 15 Feb. 2026
Not every match is instantaneous, but countless adopters describe that immediate spark that turns into a lifelong bond.
—Cathy M. Rosenthal, San Antonio Express-News, 10 Feb. 2026
See All Example Sentences for instantaneous
Recent Examples of Synonyms for instantaneous
Adjective
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When a fire alarm fails, a sprinkler system shuts down, or a fire marshal issues a violation notice, businesses often face immediate safety and compliance concerns.—
Matthew Kayser,
Miami Herald,
11 Mar. 2026
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The response in her comments was immediate and effusive.—
Hanna Wickes,
Charlotte Observer,
11 Mar. 2026
Adjective
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Add instant warmth with Buffy’s Cloud Comforter, an Internet-famous bestseller for good reason.—
Shoko Wanger,
Architectural Digest,
9 Mar. 2026
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In other words, caffeine provides an instant wake-up call, while the supporting players address longer-term concerns like discoloration, fine lines, and mild hollowness.—
Christa Joanna Lee,
Allure,
8 Mar. 2026
Cite this Entry
“Instantaneous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/instantaneous. Accessed 15 Mar. 2026.
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