Definition of instantaneous in English:

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Pronunciation: /ˌɪnst(ə)nˈteɪnɪəs/


1Occurring or done instantly: modern methods of instantaneous communication her reaction was almost instantaneous
More example sentences
  • This death would have been rapid, almost instantaneous.
  • Yet mathematicians were able to revolutionize the subject by inventing a whole new language of mathematics which was capable of expressing instantaneous change: that language was the calculus.
  • Once airborne I could immediately feel the aircraft's sensitivity because every change in height and direction is instantaneous.
2 Physics Existing or measured at a particular instant: measurement of the instantaneous velocity
More example sentences
  • Mass, instantaneous velocity, acceleration, magnetic forces, and energy puzzled them much more.
  • Also in line with experimental measurements, the examination of instantaneous velocity of simulated beads shows that pause time decreases with increasing wall shear stress.
  • Owing to the intermittent nature of turbulence, we related individual predation events to local, instantaneous relative velocities instead of bulk averages.



Pronunciation: /ˌɪnst(ə)nˈteɪnɪəsnəs/
Example sentences
  • What he was hankering after had to approximate the instantaneousness of painting - the fact that paintings are seen all at once, in a resonant ‘now’ - and simultaneously had to evoke a particular medium of painting.
  • These traits are: collective autism, bombast of presentation to the point of unreality, moral narcissism, a chronic lack of sober foresight, and total immersion in instantaneousness.
  • All this demands from the dancer openness and vulnerability to the instantaneousness of the moment, much more than in the process of a choreographed performance.


Mid 17th century: from medieval Latin instantaneus, from Latin instant- 'being at hand' (from the verb instare), on the pattern of ecclesiastical Latin momentaneus.

Words that rhyme with instantaneous

contemporaneous, cutaneous, extemporaneous, extraneous, miscellaneous, Pausanias, porcellaneous, simultaneous, spontaneous, subcutaneous

For editors and proofreaders

Line breaks: in¦stant|an¦eous

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