Steady state has a number of meanings:

• In biochemistry, steady state is a central term in enzyme kinetics.
• In cosmology, steady state is a non-standard cosmological view developed in 1949 by Fred Hoyle and others as an alternative to the Big Bang theory.
• In physiology, steady state is a system in which a particular variable is not changing but energy must be continuously added to maintain this variable constant.
• In macroeconomics, a time series variable reaches the steady state when its growth rate in time remains constant.