Definition
Hysteresis
Hysteresis is the property of a system whose state depends on its history — the output is determined not only by the current input, but by the accumulated effect of past inputs.
A system with hysteresis resists change: a single input in the opposite direction does not immediately flip the output. Instead, the system must be pushed consistently in the new direction before the output switches. This creates a gap between the threshold for turning on and the threshold for turning off.