The definition of a steady-state is an unchanging condition, system or physical process that remains the same even after transformation or change.
(noun)When you have a chemical mix that has certain properties, and the mix retains those properties even after you add a change-agent, this is an example of a steady-state.
See steady-state in Webster's New World College Dictionary
adjective
See steady-state in American Heritage Dictionary 4
Learn more about steady-state