feedback \feedback\ n.
   1. the process in which part of the output of a system is
      returned to its input.
      [WordNet 1.5]

   2. response to an inquiry or experiment.
      [WordNet 1.5] feedbag

	

	feedback
     n 1: the process in which part of the output of a system is
          returned to its input in order to regulate its further
          output
     2: response to an inquiry or experiment

	

	28 Moby Thesaurus words for "feedback":
   birdies, blooping, blurping, closed loop, closed sequence,
   current-control circuit, degeneration, distortion,
   flip-flop circuit, flutter, fluttering, hissing, howling, hum,
   motorboating, positive feedback, process loop, quality loop,
   reversed feedback, rumble, scratching, shredding, squeals, static,
   whistles, woomping, wow, wowwows

	

	feedback
     
         Part of a system output presented at its input.
        Feedback may be unintended.  When used as a design feature,
        the output is usually transformed by passive components which
        attenuate it in some manner; the result is then presented at
        the system input.
     
        Feedback is positive or negative, depending on the sign with
        which a positive change in the original input reappears after
        transformation.  Negative feedback was invented by Black to
        stabilise vacuum tube amplifiers.  The behaviour becomes
        largely a function of the feedback transformation and only
        minimally a function of factors such as transistor gain which
        are imperfectly known.
     
        Positive feedback can lead to instability; it finds wide
        application in the construction of oscillators.
     
        Feedback can be used to control a system, as in feedback
        control.
     
        (1996-01-02)