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English definition of “feedback”

feedback

noun [U] uk   /ˈfiːd.bæk/ us  

feedback noun [U] (OPINION)

B2 information or statements of opinion about something, such as a new product, that can tell you if it is successful or liked: Have you had any feedback from customers about the new soap? positive/negative feedback

feedback noun [U] (MACHINE)

the sudden, high, unpleasant noise sometimes produced by an amplifier when sound it produces is put back into it: Jimi Hendrix loved to fling his guitar around to get weird and wonderful sounds from the feedback. specialized engineering the return back into a machine or system of part of what it produces, especially to improve what is produced: Feedback from the sensors ensures that the car engine runs smoothly.
(Definition of feedback from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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