Stationary is used as an adjective, because it describes a noun.
The planets are not stationary.
We had a stationary front last night
The car was stationary due to an accident stopping traffic.
The person remained stationary until the bear passed by.
He stood stationary. He attacked with a fiery rage.
it is a noun, stationary. The demon came out of the portal.
Be sure the ladder is stationary before climbing on it.He wrote the note on a fancy piece of stationery.
He remained stationary for hours. Stationary targets are easier to hit.
Stationary has a couple of meanings. it can mean not moving, or a type of letter paper. " John, go buy me some stationary so i can write to your uncle" or " That fridge is stationary"
The stationery paper was very pretty so i used it to write a letter to a loved one.(Good sentence right? :D)I wrote down this sentence on stationary. The turret is bolted to the ground and is now stationary.
The stationary object halted the forward progress of the automobile.
The car hit a stationary vehicle.
The battle wagon has been rendered stationary, sir. The pillbox is a stationary battle emplacement.