instantaneousness

in·stan·ta·ne·ous  (nstn-tn-s)

adj.

1. Occurring or completed without perceptible delay: Relief was instantaneous.

2. Done or made as quickly or directly as possible: an instantaneous reply to my letter.

3. Present or occurring at a specific instant: instantaneous velocity; instantaneous pressure.

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[From Medieval Latin nstantneus, from Latin nstns, nstant-, present; see instant.]

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in·stanta·nei·ty (n-stnt-n-t, nstn-) n.

instan·tane·ous·ly adv.

instan·tane·ous·ness n.

Thesaurus

Noun

1.

instantaneousness - the quickness of action or occurrence; "the immediacy of their response"; "the instancy of modern communication" immediateness, instancy, immediacy celerity, rapidity, rapidness, speediness, quickness - a rate that is rapid