noun, Electronics.
See under (def 1).
[feed-bak] /ˈfidˌbæk/

the furnishing of data concerning the operation or output of a machine to an automatic control device or to the machine itself, so that subsequent or ongoing operations of the machine can be altered or corrected.
a reaction or response to a particular process or activity:
He got very little feedback from his speech.
evaluative information derived from such a reaction or response:
to study the feedback from an audience survey.
Psychology. knowledge of the results of any behavior, considered as influencing or modifying further performance.
Compare .
Biology. a self-regulatory biological system, as in the synthesis of some hormones, in which the output or response affects the input, either positively or negatively.

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
the whistling noise so produced

information in response to an inquiry, experiment, etc: there was little feedback from our questionnaire
verb, adverb
(transitive) to return (part of the output of a system) to its input
to offer or suggest (information, ideas, etc) in reaction to an inquiry, experiment, etc
See feedback

1920, in the electronics sense, from feed + back (adj.). Transferred use, “information about the results of a process” is attested by 1955.

feedback feed·back (fēd’bāk’)

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.


To surprise and create discomposure: those grades don’t faze her (1830+)


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