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 late-night policy sessions and social media posts, crafted for an instantaneous affect, observers tell USA TODAY, were unheard of during those years.
—
Phillip M. Bailey, USA TODAY, 2 Feb. 2025
Nerve stimulation and power density tests measure the instantaneous effects on a person’s nervous system.
—IEEE Spectrum, 29 Jan. 2025
Death by firing squad is considered by some to be the quickest, most instantaneous and therefore least painful way to put a person to death.
—Kevin Fixler, Idaho Statesman, 22 Jan. 2025
The date mechanism is particularly noteworthy for its instantaneous jump at midnight.
—Bhanu Chopra, Forbes, 22 Jan. 2025
See all Example Sentences for instantaneous 
Phillip M. Bailey, USA TODAY, 2 Feb. 2025
Nerve stimulation and power density tests measure the instantaneous effects on a person’s nervous system.
—IEEE Spectrum, 29 Jan. 2025
Death by firing squad is considered by some to be the quickest, most instantaneous and therefore least painful way to put a person to death.
—Kevin Fixler, Idaho Statesman, 22 Jan. 2025
The date mechanism is particularly noteworthy for its instantaneous jump at midnight.
—Bhanu Chopra, Forbes, 22 Jan. 2025
See all Example Sentences for instantaneous
Thesaurus Entries Near instantaneous
Cite this Entry
“Instantaneous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/instantaneous. Accessed 22 Feb. 2025.
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