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Longman Dictionary of Contemporary English
instantaneous
adjective
COLLOCATIONS FROM CORPUS
■ ADVERB
almost
▪ In the many cases where death is instantaneous or almost instantaneous, there will of course be no award for pain and suffering.
▪ And the effect of this sudden, almost instantaneous blast of self-recognition?
▪ At Eschede the almost instantaneous dissipation of kinetic energy was bound to cause massive damage.
▪ Anyone searching the resultant database by means of a computer terminal has almost instantaneous access to every item in the newspaper.
EXAMPLES FROM OTHER ENTRIES
▪ Death from a massive heart attack was almost instantaneous.
▪ Fortunately for him, his death was instantaneous.
The Collaborative International Dictionary
Instantaneous

Instantaneous \In`stan*ta"ne*ous\, a. [Cf. F. instantan['e].]

  1. 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.
    --Thomson.

  2. At or during a given instant; as, instantaneous acceleration, velocity, etc.

    Instantaneous center of rotation (Kinematics), in a plane or in a plane figure which has motions both of translation and of rotation in the plane, is the point which for the instant is at rest.

    Instantaneous axis of rotation (Kinematics), in a body which has motions both of translation and rotation, is a line, which is supposed to be rigidly united with the body, and which for the instant is at rest. The motion of the body is for the instant simply that of rotation about the instantaneous axis. -- In`stan*ta"ne*ous*ly, adv. -- In`stan*ta"ne*ous*ness, n.

Douglas Harper's Etymology Dictionary
instantaneous

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

Wiktionary
instantaneous

a. occur, arise, or functioning without any delay; happening within an imperceptibly brief period of time.

WordNet
instantaneous

adj. occurring with no delay; "relief was instantaneous"; "instant gratification" [syn: instant(a)]

Usage examples of "instantaneous".

Once in a million uses, the caesura serves as an instantaneous transportation device to a chosen location.

Rattled by the drumroll concussion, shaken bone from bone by the booming reports as the hills rocked and slammed under punishment, Jieret scarcely knew whether the crossbolt ripped over his head, or if wood, feather, and forge-sharpened steel had been reduced by instantaneous immolation.

The gates achieve their instantaneous effect in two ways: they transport the subject through time as well as space, and they supply or absorb energy sufficient to impart equivalent velocity according to the direction of travel.

Our instantaneous transfer is an illusion resulting from the fact that the gates move us through time as well as space.

The grubs had been sternly admonished when they had asked if the same principles might be extended to instantaneous travel.

Its doctrine does not destroy nor explain the presiding and elective power which interprets these assimilated and preserved changes, choosing out such of them as it pleases, that unavoided and incomprehensible power, the hiding place of volition and eternity, whose startling call has often been known, in some dread crisis, to effect an instantaneous restoration of the entire bygone life, making all past events troop through the memory, a swiftly awful cavalcade marching along the fibrous pavement of the brain, while each terrified thought rushes to its ashy window to behold.

There was nothing new here, the only difference being that Simmons had gone in a single white instantaneous blaze, while the departure of Harry Jnr and his mother had been accompanied by twin bomb-bursts.

These Large Arrays of Personas are instantaneous networks, since they are linked by the merci, and the merci operates superluminally.

I would rather entreat each and every one of them to immortalize this approaching, fateful hour in the evolution of a World Spiritual Crusade, by a fresh consecration to their God-given mission, coupled with an instantaneous plan of action, at once so dynamic and decisive, as to wipe out, on the one hand, with one stroke, the deficiencies which have, to no small extent, bogged down the operations of the Crusade on the home front, and tremendously accelerate, on the other, the progress of the triple task, launched, in three continents, and constituting one of its preeminent objectives.

Again Ede pruned his programs, coded them as pure signal, and in a flash of tachyons infinitely faster than light, made the almost instantaneous unfolding of his self to smaller lobes of his brain farther out among the stars.

The instantaneous deaths of many powerful enemies, graziers, members of parliament, members of standing committees, are reported.

Its effect on Reginald justifies some portion of vanity, for it was no less favourable than instantaneous.

I never knew of love until I met Lachlan, an instantaneous attachment that grew stronger each day.

As if by instantaneous yet unvoiced consent, they turned and ran for the doors, Decimus as panicked as the rest.

Though transit time proved all but instantaneous, Dylan considered enough dire possibilities to keep fans of gooey-bloody cinema supplied with trashy films full of pukey moments for at least a generation, and then the last of the lavatory folded away and a new place entirely unfolded into existence around them.