instantaneous

[in-stuhn-tey-nee-uhs]

adjective

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.

instantaneous

/ ˌɪnstənˈteɪnɪəs, ɪnˌstæntəˈniːɪtɪ /

adjective

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

Other Word Forms

• instantaneity noun
• instantaneousness noun
• instantaneously adverb

Word History and Origins

Origin of instantaneous¹

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

Example Sentences

The proposal garnered instantaneous backlash from American cattle producers.

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Where “Eusexua” is “the bird’s eye view of the human experience,” Twigs says, “Afterglow” is meant to capture humanity through a more direct lens, where feelings are unfiltered and instantaneous.

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In what amounted to an instantaneous confidence boost, Lateef took off running on his team’s first play from scrimmage and spun his way for 14 yards.

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In physics, an event is an instantaneous occurrence at a specific place and time.

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It’s seeking to upgrade the current permit process, utilizing artificial intelligence to get nearly instantaneous permit reviews for single-family homes and accessory dwelling units, as well as reduce permit fees for restaurants with outdoor dining.

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Related Words

• rapid 
• spontaneous 
• transitory