a person who runs or is licensed to run a stationary engine.
noun, Meteorology. 1. a front between warm and cold air masses that is moving very slowly or not at all. stationary front (stā’shə-něr’ē) A transition zone between two nearly stationary air masses of different density. See more at front.
- Stationary orbit
noun 1. (astronautics) an orbit lying in, or approximately in, the plane of the equator for which the orbital period is equal to the spin period of the central body
- Stationary point
noun 1. a point on a curve at which the tangent is either horizontal or vertical, such as a maximum, a minimum, or a point of inflection 2. (astronomy) a point in the apparent path of a planet when it reverses direction
noun, Physics. 1. any of several energy states an atom may occupy without emitting electromagnetic radiation.