noun (n)

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

  source: wordnet30
• (physics) the exponential return of a system to equilibrium after a disturbance(noun.process)

  Synonym:
  relaxation behavior
  

  source: wordnet30
• a feeling of refreshing tranquility and an absence of tension or worry(noun.feeling)

  Synonym:
  easiness
  

  source: wordnet30
• an occurrence of control or strength weakening(noun.event)

  Example:
  The relaxation of requirements.
  

  Synonym:
  loosening, slackening
  

  source: wordnet30
• freedom from activity (work or strain or responsibility)(noun.act)

  Synonym:
  ease, repose, rest
  

  source: wordnet30
• 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.act)

  Synonym:
  relaxation method
  

  source: wordnet30
• the act of making less strict(noun.act)

  Synonym:
  liberalisation, liberalization
  

  source: wordnet30
• The act or process of relaxing, or the state of being relaxed; as, relaxation of the muscles; relaxation of a law.(noun)

  source: webster1913