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say it: ree-lak-SAY-shuhn
relaxation is a noun meaning "(physiology) the gradual lengthening of inactive muscle or muscle fibers". It carries 7 recorded senses.
(physics) the exponential return of a system to equilibrium after a disturbance
physics
a feeling of refreshing tranquility and an absence of tension or worry
“the easiness we feel when sleeping”
an occurrence of control or strength weakening
“the relaxation of requirements”
“the loosening of his grip”
“the slackening of the wind”
freedom from activity (work or strain or responsibility)
“took his repose by the swimming pool”
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
the act of making less strict
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for relaxation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.