I've heard it in a context of physical media degradation, including floppy discs and CDs as you mentioned, but also SSDs, HDDs and so on. A good example is a wi

I've heard it in a context of physical media degradation, including floppy discs and CDs as you mentioned, but also SSDs, HDDs and so on. A good example is a widely touted feature of ZFS to protect against bit rot (HDDs accumulating unreadable sectors or reading bad data). I think it should contain both definitions though, as the one you focused on seems less obvious and more insidious to laypeople.