turbulence in WordNet English dictionary

1. a state of violent disturbance and disorder (as in politics or social conditions generally)
   "the industrial revolution was a period of great turbulence"
   turbulence  upheaval  Sturm und Drang 
   
2. unstable flow of a liquid or gas
   turbulence  turbulency 
   
3. instability in the atmosphere
   turbulence