Negative feedback is a process in which information about an event or condition is fed back to correct, control or adjust it. In this case, the feedback is negative because it works against the original input and helps to counteract any errors or discrepancies that may occur. This type of feedback is commonly used in systems such as thermostats, where a sensor detects the temperature and sends a signal to turn on or off the heating/cooling system until it reaches the desired level. The negative feedback loop helps maintain stability by constantly monitoring and adjusting the output based on the input, ensuring that any deviations are quickly corrected.