feedback

 
Pronunciation: /ˈfiːdbak/

noun

[mass noun]
  • 1information about reactions to a product, a person’s performance of a task, etc. which is used as a basis for improvement.
  • 2the modification or control of a process or system by its results or effects, for example in a biochemical pathway or behavioural response. See also negative feedback, positive feedback.
  • 3the return of a fraction of the output signal from an amplifier, microphone, or other device to the input of the same device; sound distortion produced by this.