instantaneous

adj

1. (not-comparable)Occurring, arising, or functioning without any delay; happening within an imperceptibly brief period of time.

   “This instantaneous motion is supposed by you, to be infinitely swift.”

   “However, no lovers in romance ever cemented a more inſtantaneous friendſhip.”

   “The colour now rushed into Elizabeth's cheeks in the instantaneous conviction of its being a letter from the nephew, instead of the aunt; [...]”

   “I walk always with my right hand closed round the india-rubber ball which I have in my trouser pocket. The pressing of this ball actuates a detonator inside the flask I carry in my pocket. It's the principle of the pneumatic instantaneous shutter for a camera lens.”

   “The penis is the perfectly obvious and natural symbol of instantaneous time.”