Definition of "stationarity" [stationarity]

• The condition of being stationary (noun)
• The condition of a series in which the value at all points is the same; the stationary value itself (noun)

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• "Economists and geologists have identified one culprit in the water-management problem, a mind-set they call "stationarity" — the belief that natural systems fluctuate within a narrow, predictable range, even over long periods."
• "Using modern statistics you'd go even further and discover that the temperatures anomalies shown (which are a derivative of the the actual temperatues) show non-stationarity, meaning that they are not suitable for any kind of forecast."
• "The past as a guide to the future assumes "stationarity" but, past events and their management may be informative"