Final answer:
The term for the reduction in receiver sensitivity due to a nearby strong signal is desensitization, which impairs the receiver's ability to process weak signals.
Step-by-step explanation:
The term for the reduction in receiver sensitivity caused by a strong signal near the received frequency is desensitization. This occurs when a strong nearby signal overloads the receiver's front end, reducing its ability to properly receive the intended weak signal. Desensitization is a common concern in radio communication systems and can affect the performance of various types of receivers, including those used in wireless networks, broadcasting, and satellite communications.