Stationary

• Not moving (fixed in position, immobile, motionless, static, or at rest).
• Unchanging (for instance in measure, mode, condition, character).
• In statistics and probability: a stationary process.
• In mathematics: a stationary point.
• In mathematics: a stationary set.
• In physics: a time-invariant quantity, such as a constant position or temperature.
• In physics: a steady state physical process, such as a vibration at constant amplitude and frequency or a steady fluid flow.

The word or its spelling is sometimes confused with stationery, meaning paper or office supplies.

See also

• Stationary phase, a disambiguation page