It's possible you're thinking about:

* The potential for movement: A stationary object might have the *potential* to move, but it's not currently in motion. Think of a rock on a hill. It's not moving, but a strong push could send it rolling down.

* Internal movement: Even if an object appears stationary from the outside, its internal components might be in motion. For example, the atoms and molecules within a rock are constantly vibrating.

* Relative movement: An object might appear stationary from one frame of reference but be moving relative to another. For example, a person sitting on a train might appear stationary to someone else on the train, but they are moving relative to someone standing on the platform.

In short, a stationary object has no movement. If there's any movement happening, the object is not truly stationary.