noun (n)

• unstable flow of a liquid or gas(noun.phenomenon)

  Synonym:
  turbulency
  

  source: wordnet30
• instability in the atmosphere(noun.state)

  source: wordnet30
• a state of violent disturbance and disorder (as in politics or social conditions generally)(noun.state)

  Example:
  The industrial revolution was a period of great turbulence.
  

  Synonym:
  sturm und drang, upheaval
  

  source: wordnet30
• The quality or state of being turbulent; a disturbed state; tumult; disorder; agitation.(noun)

  source: webster1913