Something that is stationary is not moving. Stationary cars in traffic jams cause a great deal of pollution. standing still instead of moving (stationarius, from statio; STATION)
One who, or that which, is stationary, as a planet when apparently it has neither progressive nor retrograde motion
refers to a figure danced without progression or done on the spot 'Stationary Walks' is also the name of a Samba figure in the Gold international syllabus