Monostable is a term used in electronics to describe a circuit that has only one stable state. In other words, it can be triggered to switch from its resting state to an unstable state, but it will never remain in that state indefinitely. Some common synonyms for monostable include one-shot, pulse generator, and time delay circuit. These terms refer to the fact that the circuit can be triggered by a single input to produce a short-lived output signal. Other related terms include astable and bistable, which describe circuits with two or three stable states, respectively. Regardless of the terminology used, understanding these concepts is essential when working with electronic circuits and devices.