feedback definition, feedback meaning | English dictionary

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a    the return of part of the output of an electronic circuit, device, or mechanical system to its input, so modifying its characteristics. In negative feedback a rise in output energy reduces the input energy; in positive feedback an increase in output energy reinforces the input energy  
b    that part of the output signal fed back into the input  
2    the return of part of the sound output by a loudspeaker to the microphone or pick-up so that a high-pitched whistle is produced  
3    the whistling noise so produced  
a    the effect of a product or action in a cyclic biological reaction on another stage in the same reaction  
b    the substance or reaction causing such an effect, such as the release of a hormone in a biochemical pathway  
5    information in response to an inquiry, experiment, etc.  
there was little feedback from our questionnaire     
  feed back      adv  
6    tr   to return (part of the output of a system) to its input  
7    to offer or suggest (information, ideas, etc.) in reaction to an inquiry, experiment, etc.  

negative feedback  
      n      See       feedback  
positive feedback  
      n      See       feedback       1  
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