Definition of "Relaxation" :

noun: the act of making less strict

noun: a method of solving simultaneous equations by guessing a solution and then reducing the errors that result by successive approximations until all the errors are less than some specified amount

noun: freedom from activity (work or strain or responsibility)

noun: an occurrence of control or strength weakening

"The relaxation of requirements."

noun: a feeling of refreshing tranquility and an absence of tension or worry

noun: (physics) the exponential return of a system to equilibrium after a disturbance

noun: (physiology) the gradual lengthening of inactive muscle or muscle fibers