What is Prosperity?

Legal Definition
Prosperity is the state of flourishing, thriving, good fortune or successful social status. Prosperity often encompasses wealth but also includes other factors which can be independent of wealth to varying degrees, such as happiness and health.
-- Wikipedia
Legal Definition
A time in which a state or country has a low level of unemployment and a high level of sales and total incomes. If inflation is kept low, sales figures will increase and salaries will rise.