An economy with stable or mildly fluctuating size. The term is originated from ecological economics and typically refers to a national economy, but it can also be applied to the economic system of a city, a region, or of the entire planet. The steady state is the long-term outcome of an economy.
Additional meaning of Steady State Economy:
An economy can reach a steady state after a period of growth or after a period of downsizing. To be sustainable, a steady state economy must not exceed its ecological limits.