feedback
UK: ˈfiːdbæk | US: ˈfiːdbæk
n. information or reactions about a product, service, or process, used to improve performance or understanding.
n. (Electronics) the return of part of an output signal to the input, often to modify the output.
The word "feedback" emerged in the early 20th century, combining "feed" (from Old English fēdan, meaning "to supply") and "back" (from Old English bæc, meaning "return"). Initially used in engineering to describe the return of part of a system's output to its input, it later expanded to general use for evaluative responses. The logic is straightforward: "feeding" information "back" to its source.
The teacher gave constructive feedback on the student's essay.
Customer feedback helps businesses improve their products.
The microphone screeched due to audio feedback.
She requested feedback from her colleagues after the presentation.
Positive feedback loops can amplify changes in a system.