relaxation

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

(noun) (physics) the exponential return of a system to equilibrium after a disturbance. Synonyms: relaxation behavior.

(noun) a feeling of refreshing tranquility and an absence of tension or worry. Synonyms: easiness. Example: "The easiness we feel when sleeping."

(noun) an occurrence of control or strength weakening. Synonyms: loosening, slackening. Examples: "The relaxation of requirements." "The loosening of his grip." "The slackening of the wind."

(noun) freedom from activity (work or strain or responsibility). Synonyms: rest, ease, repose. Example: "Took his repose by the swimming pool."

(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. Synonyms: relaxation method.

(noun) the act of making less strict. Synonyms: liberalization, liberalisation.