Definition of 'Hyperinflation'
Extremely rapid or out of control inflation. There is no precise numerical definition to hyperinflation. Hyperinflation is a situation where the price increases are so out of control that the concept of inflation is meaningless.
Investopedia explains 'Hyperinflation'
When associated with depressions, hyperinflation often occurs when there is a large increase in the money supply not supported by gross domestic product (GDP) growth, resulting in an imbalance in the supply and demand for the money. Left unchecked this causes prices to increase, as the currency loses its value.
When associated with wars, hyperinflation often occurs when there is a loss of confidence in a currency's ability to maintain its value in the aftermath. Because of this, sellers demand a risk premium to accept the currency, and they do this by raising their prices.
One of the most famous examples of hyperinflation occurred in Germany between January 1922 and November 1923. By some estimates, the average price level increased by a factor of 20 billion, doubling every 28 hours.