sta·tion·ar·y 
(stāshə-nĕr′ē)
(stāshə-nĕr′ē)adj.
1.
a. Not moving.
b. Not capable of being moved; fixed.
2. Unchanging: a stationary sound.
n. pl. sta·tion·ar·ies
One that is stationary.
[Middle English stacionarie, from Old French stationnaire, from Medieval Latin statiōnārius, from Latin, belonging to a military station, from statiō, statiōn-, station; see STATION.]