the process in which part of the output of a system is returned to its input in order to regulate its further output
"The audio engineer adjusted the mixing board to reduce feedback, ensuring that no screeching sound would loop back from the speakers into the microphone."
response to an inquiry or experiment
"The researchers waited anxiously for feedback from their latest clinical trial before announcing the results to the press."
Critical assessment of a process or activity or of their results.
"The manager asked for honest feedback on our new marketing campaign before we launched it publicly."
In plain English: Feedback is information about how something went that helps you improve next time.
"The teacher appreciated the positive feedback from her students after the presentation."
Usage: Use feedback to describe information provided about performance or reactions to help improve a process or result. Avoid using it as a verb in casual speech when you simply mean to give an opinion.
To generate the high-frequency sound by allowing a speaker to cause vibration of the sound generator of a musical instrument connected by an amplifier to the speaker.
"When I plugged my electric guitar directly into the venue's PA system, the microphone picked up the amp and created a terrifying squealing feedback loop that drowned out the entire band."
In plain English: To give feedback means to tell someone what you think about something they did or made.
"The manager will feedback to the team about their performance next week."
Usage: Do not use "feedback" as a verb to describe giving opinions or suggestions; that usage is incorrect in standard English. Reserve the term strictly for the technical phenomenon where an electronic system produces a high-pitched squealing noise due to signal amplification loops.
The word feedback is a compound of feed and back. It was first used in engineering to describe information returned from an output stage to the input stage of a system.