Open English Wordnet
Nouns
(n)relaxation, relaxation behavior(physics) the exponential return of a system to equilibrium after a disturbance
(n)easiness, relaxationa feeling of refreshing tranquility and an absence of tension or worry“the easiness we feel when sleeping”
(n)relaxation, loosening, slackeningan occurrence of control or strength weakening“the relaxation of requirements”, “the loosening of his grip”, “the slackening of the wind”
(n)rest, ease, repose, relaxationfreedom from activity (work or strain or responsibility)“took his repose by the swimming pool”
(n)relaxation, relaxation methoda 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