Longman Dictionary of Contemporary English homepage

feedback

 noun
     
feed‧back S3 [uncountable]
1 advice, criticism etc about how successful or useful something is:
How can I provide feedback without making someone angry?
feedback on
Try to give each student some feedback on the task.
2TPE a very unpleasant high noise, caused when a microphone is too close to an amplifier
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
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