Definition of steady state in English:

steady state

noun

  • An unvarying condition in a physical process, especially as in the theory that the universe is eternal and maintained by constant creation of matter.

    • ‘The result for Milne's cosmology was a stationary universe with an infinite past age which, of course, acted as a precursor to the steady-state theory.’
    • ‘Earth science teachers could show why the steady-state theory of the universe lost out to the Big Bang’