What is a stationary (Qphys)

No.14225928 ViewReplyOriginalReport
Im confused, as the definition in my textbook def. of station wave is
>states of system in which measurable properties of the system do not change with time
To me, that sounds like it would be a linear function and not a wave, which is constantly changing. But they make it seem like it's relatable to standing waves, which make more sense that it is a wave fixed at certain points forming nodes