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feedback feed·back (fēd'bāk')
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.
The portion of the output so returned.
The return of information about the result of a process or activity.
negative feedback n.
Feedback that reduces the output of a system.
The supply of an input to some process or system as a function of its output. See more at negative feedback, positive feedback.
|negative feedback |
Feedback in which the output quantity or signal lowers the input quantity or signal. Negative feedback is used in natural and artificial regulatory mechanisms, as well as in the design of oscillators.
A process in which a system regulates itself by monitoring its own output. That is, it “feeds back” part of its output to itself. Feedback is used to control machines; a heating system, for example, uses a thermostat to monitor and adjust its output. Feedback is also used by the human brain to control various muscles and joints.
Note: By extension, “feedback” is any response or information about the result of a process.
Note: Feedback is usually a feature of automation.
Response, esp information and opinion: We'll wait for feedback before we try anything else
[1950s+; fr the portion of output fed back to the input in an automatic control circuit or system]
in biology, a response within a system (molecule, cell, organism, or population) that influences the continued activity or productivity of that system. In essence, it is the control of a biological reaction by the end products of that reaction.