View synonyms for instantaneous


[ in-stuhn-tey-nee-uhs ]


  1. occurring, done, or completed in an instant:

    an instantaneous response.

    Synonyms: abrupt, sudden, immediate

  2. existing at or pertaining to a particular instant:

    the instantaneous position of the rocket.


/ ˌɪnstənˈteɪnɪəs; ɪnˌstæntəˈniːɪtɪ /


  1. occurring with almost no delay; immediate
  2. happening or completed within a moment

    instantaneous death

  3. maths
    1. occurring at or associated with a particular instant
    2. equal to the limit of the average value of a given variable as the time interval over which the variable is considered approaches zero

      instantaneous velocity

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Derived Forms

  • ˌinstanˈtaneously, adverb
  • ˌinstanˈtaneousness, noun

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Other Words From

  • in·stan·ta·ne·i·ty [in-stan-tn-, ee, -i-tee, in-st, uh, n-t, uh, -, nee, -], instan·tane·ous·ness noun
  • instan·tane·ous·ly adverb

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Word History and Origins

Origin of instantaneous1

From the Medieval Latin word instantāneus, dating back to 1645–55. See instant, -an, -eous

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Example Sentences

If you come to need that instantaneous jolt of dopamine that comes from discovering some new corner of the internet, you’ll end up needing more and more stimulation to keep feeling fresh as time goes on.

Your results with SEO won’t be instantaneous, but you will be glad you put extra effort into optimizing your site’s SEO down the road.

At every moment, our existence takes place only on the instantaneous, knife-edge of Now, which can never be captured and held immobile.

In contrast, South Korean officials gave near instantaneous approval to commercial labs, and they quickly began testing 10,000 people a day.

The moves also will temporarily alter the look and feel of Twitter, a service built on instantaneous conversation, quips, and breaking news.

My interest in sex was pretty instantaneous, and we just continued having a casual sexual relationship.

Of the Conkling letter, his private secretaries later observed: “Nothing he ever uttered had a more instantaneous success.”

But it is important to understand that this effect is neither large nor instantaneous.

By the end of 2013, over 70 percent of humanity will have access to instantaneous, low-cost communications and information.

Despite the alarming cost, the president demands instantaneous action on his proposals.

The vision—it had been an instantaneous flash after all and nothing more—had left his mind completely for the time.

He would have welcomed instantaneous sleep—ten hours of refreshing, dreamless sleep.

Its success was instantaneous, but Campbell was deficient in energy and perseverance and did not follow it up.

Here is an instantaneous photograph one of our boys got of the battle; it's for sale on every news-stand.

It was an instantaneous apparition of absolute bodily substance, which carried its own warrant of complete bona fides.


Related Words




instantinstant camera