feedback
n. · v.-
1 loud noise from speakers (n.) B2 Upper Intermediate Musicthe high, annoying sound made when a microphone is too close to a speaker.
the screeching or howling sound caused by an acoustic loop between a microphone and a loudspeaker.
ExampleThe lead singer moved too close to the speakers and caused a loud burst of feedback.
ExampleThe sound engineer scrambled to adjust the levels after a sudden spike of feedback pierced through the monitors during the soundcheck.
UsageOften used with the verb 'get' or 'hear'.
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2 technical control loop (n.) C1 Advanced Technical Sciencethe process where part of a machine's output is sent back to the input to help control it.
the return of a portion of the output of a process or system to the input, especially when used to maintain performance or control.
ExampleThe thermostat uses a feedback loop to keep the room at a steady temperature.
ExampleThe biological system relies on a complex negative feedback mechanism to regulate hormone levels and maintain internal homeostasis.
UsageCommonly used in the phrases 'positive feedback' and 'negative feedback'.
Teacher's tipIn technical contexts, 'positive feedback' often refers to a self-reinforcing loop that can lead to instability, which is different from the everyday meaning of 'praise'.
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3 to provide information (v.) B2 Upper Intermediate Academic Formalto give information or opinions back to someone about a project or performance.
to provide evaluative information or report results back to a person or system.
ExampleThe manager promised to feedback the results of the survey to the staff next week.
ExampleThe researchers will feedback their findings to the local community before publishing the final report in a peer-reviewed journal.
UsageOften used with the preposition 'to' or 'on'.
Teacher's tipThis verb use is common in corporate and educational settings but can sound overly formal in casual conversation.
From feed + back.