"relaxation" in the noun sense
physiology) the gradual lengthening of inactive muscle or muscle fibers
2. relaxation, relaxation behavior
physics) the exponential return of a system to equilibrium after a disturbance
3. easiness, relaxation
a feeling of refreshing tranquility and an absence of tension or worry
"the easiness we feel when sleeping"
4. relaxation, loosening, slackening
an occurrence of control or strength weakening
"the relaxation of requirements"
"the loosening of his grip"
"the slackening of the wind"
5. rest, ease, repose, relaxation
freedom from activity (work or strain or responsibility
"took his repose by the swimming pool"
6. relaxation, relaxation method
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
7. liberalization, liberalisation, relaxation
the act of making less strict
Source: WordNet® (An amazing lexical database of English)
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