9 Grammatical Pitfalls


[in-stuh n-tey-nee-uh s] /ˌɪn stənˈteɪ ni əs/
occurring, done, or completed in an instant:
an instantaneous response.
existing at or pertaining to a particular instant:
the instantaneous position of the rocket.
Origin of instantaneous
1645-55; < Medieval Latin instantāneus. See instant, -an, -eous
Related forms
[in-stan-tn-ee-i-tee, in-stuh n-tuh-nee-] /ɪnˌstæn tnˈi ɪ ti, ˌɪn stən təˈni-/ (Show IPA),
instantaneousness, noun
instantaneously, adverb
1. immediate, sudden, abrupt. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for instantaneously
  • Enter the letters on your tile rack and instantaneously, words you probably never knew existed appear for your selection and use.
  • We see lightning instantaneously because it travels at the speed of light to our eyes.
  • Nearly instantaneously, both qubits would be in superposition and the coupling would be turned off.
  • The chips in the implant will receive signals from the collar and send them to a computer instantaneously.
  • It vaporizes easily so if you put it in a dish in a room, you'd smell it instantaneously.
  • Nothing can move faster than instantaneously, even information.
  • The article suggests that the home electrical socket will not be enough to instantaneously charge a car.
  • Thus, time and space is both traversed instantaneously as the illusive tachyon particle.
  • Instead, every bit of it can instantaneously become the venue for a seminar, a snack or romance.
  • By contrast, financial contracts can be written almost instantaneously and without limit.
British Dictionary definitions for instantaneously


occurring with almost no delay; immediate
happening or completed within a moment: instantaneous death
  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
Derived Forms
instantaneously, adverb
instantaneousness, instantaneity (ɪnˌstæntəˈniːɪtɪ) noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for instantaneously



1640s (implied in instantaneously), formed in English from Medieval Latin *instantaneus, from instantem (see instant (n.)) on model of spontaneous. Related: Instantaneousness.

Online Etymology Dictionary, © 2010 Douglas Harper
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