a the return of part of the output of an electronic circuit, device, or mechanical system to its input, so modifying its characteristics. In negative feedback a rise in output energy reduces the input energy; in positive feedback an increase in output energy reinforces the input energy
b that part of the output signal fed back into the input
2 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
3 the whistling noise so produced
a the effect of a product or action in a cyclic biological reaction on another stage in the same reaction
b the substance or reaction causing such an effect, such as the release of a hormone in a biochemical pathway
5 information in response to an inquiry, experiment, etc.
there was little feedback from our questionnaire
feed back adv
6 tr to return (part of the output of a system) to its input
7 to offer or suggest (information, ideas, etc.) in reaction to an inquiry, experiment, etc.
n See →
n See →
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