A Monostable Multivibrator is an electronic circuit that has one stable state and one unstable state. When triggered, it temporarily switches to the unstable state and then returns to the stable state after a predetermined time. This makes it useful for generating single pulses in response to an input signal. Typically built using components like transistors or operational amplifiers, a monostable multivibrator can be found in various applications, such as timers, pulse width modulation, and signal processing. Its ability to produce a precise time delay makes it valuable in digital electronics and control systems.