Relaxation – a gradual transition of physical-chemical properties (parameters) of electrochemically activated water or solution from a meta-stable state after electrochemical activation into a state of thermo-dynamic equilibrium. Relaxation rate depends on time during which an estimated characteristic (рН, ORP, electric conductivity, surface tension, catalytic activity, solvent ability etc.) changes by е times as compared to initial (immediately after electrochemical and electrophysical exposure) value.