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1. (a).
The return of a portion of the output of a process or system to the input,especially
when used to maintain performance or to control a system or process. (b).
The portion of the output so returned. (c).
Sound created when a transducer such as a microphone or electric guitar picks
up sound from a speaker connected to an amplifier and regenerates it back through
the amplifier. 2. The
return of information about the result of a process or activity; an evaluative
response: asked the students for feedback on the new curriculum. 3.
The process by which a system, often biological or ecological, is modulated, controlled,
or changed by the product, output, or response it produces.
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