Station
A station is the moment a planet appears to stop before changing direction, either turning retrograde or turning direct, and traditional astrology reads a stationary planet as unusually emphatic.
Nothing stops in space. The apparent halt is the turning point of the same relative motion that produces retrogradation, and near it a planet's daily movement falls almost to nothing, so it can sit on the same degree for days.
That lingering is the reason for the emphasis: a planet standing still on a degree of your chart stays there far longer than a moving one would. The station direct is generally read as the more constructive of the two.
Frequently asked
How do I find a station in an ephemeris?
Look for the row where the R appears or disappears in a planet's column, then check how little it moved on the days either side.
Is a stationary planet strong?
Classical practice treats it as emphatic rather than dignified. It lingers, so whatever it touches it touches for longer.