Stasjonært

Stasjonært is a Norwegian adjective meaning stationary, fixed in place, or not moving. It derives from stasjon (station) and is used in both everyday language and technical contexts to contrast with portable or mobile conditions. In general usage it describes objects or setups that are intended to stay in one location, such as stasjonært datautstyr (desktop equipment) versus portable devices.

In science and engineering, stasjonært has more precise senses. In physics and chemistry, a stasjonær tilstand or stasjonært system denotes a state that does not change over time. In quantum mechanics, stationary states are energy eigenstates. In statistics and time-series analysis, a stasjonær prosess is one whose statistical properties, such as mean and variance, do not depend on absolute time but only on time lags. In signal processing and control theory, stationary signals have statistical characteristics that are invariant with respect to time.

In medical contexts, the term can describe a patient whose condition is stable, not deteriorating, though more common terms are stable or stabile. Etymology-wise, stasjonært comes from stasjon and Latin statio; in Norwegian, adjectives have inflected forms and stasjonært is the form used in predicative constructions or with neuter nouns. The term ungefähr overlaps with English stationary and is used across disciplines to denote a lack of temporal change, but its precise meaning can vary by field.