- the lag in response exhibited by a body in reacting to changes in the forces, especially magnetic forces, affecting it.
- the phenomenon exhibited by a system, often a ferromagnetic or imperfectly elastic material, in which the reaction of the system to changes is dependent upon its past reactions to change.
- the lag in a variable property of a system with respect to the effect producing it as this effect varies, esp the phenomenon in which the magnetic flux density of a ferromagnetic material lags behind the changing external magnetic field strength
