Relaxation stands quite generally for a release of tension, a return to equilibrium. In the sciences, the term is used in the following ways:In physics:Relaxation time, the time in which a system changes to an equilibrium conditionRelaxation (NMR), processes by which nuclear magnetization returns to the equilibrium distributionDielectric relaxation, the delay in the dielectric constant of a materialStructural relaxation, responsible for the glass transitionIn mathematics:Relaxation technique (ma… (More on Relaxation)