• WordNet 3.6
    • adj instantaneous occurring with no delay "relief was instantaneous","instant gratification"
    • ***
Webster's Revised Unabridged Dictionary
    • Instantaneous At or during a given instant; as, instantaneous acceleration, velocity, etc.
    • Instantaneous Done or occurring in an instant, or without any perceptible duration of time; as, the passage of electricity appears to be instantaneous . "His reason saw
      With instantaneous view, the truth of things."
    • ***
Century Dictionary and Cyclopedia
    • instantaneous Done or produced in an instant; occurring or acting without any perceptible lapse of time.
    • instantaneous In mech., existing in or referring to an instant of time; momentary: as, instantaneous position, displacement, velocity, acceleration, etc. (that is, the position, etc., at any instant).
    • ***
Chambers's Twentieth Century Dictionary
    • adj Instantaneous done in an instant: momentary: occurring or acting at once: very quickly
    • ***


  • Billy Graham
    “Being a Christian is more than just an instantaneous conversion; it is like a daily process whereby you grow to be more and more like Christ.”


Webster's Revised Unabridged Dictionary
Cf. F. instantané,
Chambers's Twentieth Century Dictionary
L. instans, -antis, pr.p. of instārein, upon, stāre, to stand.


In literature:

Between 300 degrees and 400 degrees Landrin obtained plasters setting almost instantaneously when mixed with a small amount of water.
"Scientific American Supplement, No. 794, March 21, 1891" by Various
They have also the property of being able to bury themselves almost instantaneously in the soft mud when disturbed.
"Journals Of Two Expeditions Of Discovery In North-West And Western Australia, Vol. 1 (of 2)" by George Grey
Voluntary attention is thus an essentially instantaneous affair.
"Talks To Teachers On Psychology; And To Students On Some Of Life's Ideals" by William James
The reply was instantaneous.
"Guy Rivers: A Tale of Georgia" by William Gilmore Simms
No doubt death was practically instantaneous.
"The Grey Wig: Stories and Novelettes" by Israel Zangwill
The transmission of motion from particle to particle does not occur instantaneously, but requires time.
"General Science" by Bertha M. Clark
But this change will by no means be brought about instantaneously.
"The Birth-Time of the World and Other Scientific Essays" by J. (John) Joly
The first, connected with the dampers, permits the playing of sustained sounds, or damping them instantaneously.
"Scientific American Supplement, No. 643, April 28, 1888" by Various
How instantaneously it acts!
"The Greatest Thing In the World and Other Addresses" by Henry Drummond
He is extremely self-reliant, and decides and acts instantaneously.
"Shakespearean Tragedy" by A. C. Bradley

In poetry:

Some eyes are trained to scan large field
Till instantaneous glance may yield
A knowledge full and plenty;
While others keep a narrow ken
And view the ways of active men
With satisfaction scanty.
"The Five Senses" by Jared Barhite
The launching of the vessel was very well carried out,
While the guests on the stands cheered without any doubt,
Under the impression that everything would go well;
But, alas! instantaneously a bridge and staging fell.
"The Albion Battleship Calamity" by William Topaz McGonagall
Because four brave firemen were killed instantaneously on the spot,
Which by the spectators will never be forgot;
While the Fire Fiend laughingly did hiss and roar,
As he viewed their mangled bodies. with the debris covered o'er.
"The Clepington Catastrophe" by William Topaz McGonagall

In news:

The brain cannot possibly make sense of incoming sensory information instantaneously.
Whether you need to check the weather, your route to work, or the calorie count for all three meals of the day, you can do so instantaneously with the numerous downloadable apps for mobile devices.
Although the area has been in a serious drought over the last couple of months, the instantaneous rush of water caused by the heavy rain overwhelmed the area.
When he became CEO of Schneider Electric's $3 billion North American division based in Palatine, IL, he experienced a nearly instantaneous transformation.
Suddenly there's crying, a father quick to comfort his shaken-up son and, from Rogen, instantaneous laughter.
Juan Carlos García Padilla is able to access feedback and records instantaneously through his handheld device.
I also know that in a world obsessed with the instantaneous sharing of thoughts the internet has provided us, people don't always think before they write things.
In listening to and looking at the natural world, light from a scene arrives at our eyes instantaneously, while sound takes time.
Teleportation , the science-fiction fantasy of moving objects instantaneously through space from one location to another, has become reality—an achievement both more subtle and spectacular than many early news reports indicated.
We live in a world of instantaneous information -a world of technology that allows us the ability to use several search engines through the World Wide Web.
In today's world of information abundance and instantaneous connectivity, have we become too connected and are we sharing too much about ourselves and others.
New York City schools may pilot a new mobile app this summer that provides parents with nearly instantaneous notifications if their students are tardy or absent from class.
Fun, friendly designs depict energy use for instantaneous viewing on TVs, iPads, touchscreens and more.
The instantaneous messaging system can do so much more than just "move messages around," Gilmour says.
In the event of a catastrophic hose failure, Smart-Hose Technology is designed to instantaneously stop the flow of material in both directions.

In science:

It is not instantaneous. (2) The forces which induce the process come from the advanced fields of the particles that absorb the emitted photons.
Spinors in Quantum Geometrical Theory
Up to now, the latter phenomenon has only been studied assuming the instantaneous medium response10,11 .
Instability of speckle patterns in random media with noninstantaneous Kerr nonlinearity
The function F in Eq. (4) is the same as in the case of instantaneous nonlinearity11 , while H (x, y ) = x2 + (1 + y )2 originates from the noninstantaneous nature of the nonlinear response.
Instability of speckle patterns in random media with noninstantaneous Kerr nonlinearity
The origin of the time coordinate is defined such that the instantaneous separation vector between the gravitating body and the photon is perpendicular to the photon’s path at t = 0.
The speed of gravity has not been measured from time delays
To simplify matters, and emphasize the difference between the frameworks used by Will and Kopeikin, we will evaluate the time delay for a model with instantaneous gravitational propagation, i.e., cg → ∞.
The speed of gravity has not been measured from time delays