the extent or degree to which something is magnetized

the total magnetic moment per unit volume of material. Also, a measure of the contribution to the magnetic flux by some material within an H field.

Magnetization is a property of some materials (e.g. magnets) that describes to what extent they are affected by magnetic fields, and also determines the magnetic field that the material itself creates. Magnetization is defined as the amount of magnetic moment per unit volume. The origin of the magnetic moments that create the magnetization can be either microscopic electric currents corresponding to the motion of electrons in atoms, or the spin of the electrons.