a state of violent disturbance and disorder (as in politics or social conditions generally); "the industrial revolution was a period of great turbulence"
{i} sudden disruption or disturbance (as in the social or political situation); elevation (especially in the surface of the earth)
An upheaval is a big change which causes a lot of trouble, confusion, and worry. Wherever there is political upheaval, invariably there are refugees Having a baby will mean the greatest upheaval in your life. a very big change that often causes problems (heave)