information or statements of opinion about something, such as a new product, that can tell you if it is successful or liked

Have you had any feedback from customers about the new soap? 有关新款肥皂你有没有收到顾客的反馈意见？

positive/negative feedback 正面的／负面的反馈信息

the sudden, high, unpleasant noise sometimes produced by an amplifier when sound it produces is put back into it

Jimi Hendrix loved to fling his guitar around to get weird and wonderful sounds from the feedback. 吉米‧亨德里克斯喜欢用力弹拨他的吉他，这样扬声器的啸声中就会传出一种怪诞奇妙的声音。

the return back into a machine or system of part of what it produces, especially to improve what is produced

Feedback from the sensors ensures that the car engine runs smoothly. 探测器的反馈能确保汽车引擎平稳运转。