time-reversible

Time-reversible describes a process or system where the sequence of events could run backward and still follow the same physical laws, without any contradictions. In other words, if you imagine rewinding a video of such a process, it would look physically plausible and consistent with the rules of physics. This concept is common in fundamental physics for idealized systems, like certain microscopic particles or equations, but many real-world processes, such as aging or friction, are not time-reversible because they involve irreversible changes or energy loss.