The term "constant state" refers to a condition or situation that remains unchanged over time. It is something that persists and does not vary, even when other factors around it may be changing. In mathematics, a constant is any value that remains the same no matter what operations are performed on variables. Similarly, in physics, constants such as gravity or speed of light remain fixed regardless of changes in location or time. Therefore, "constant state" can refer to something that stays consistent and unaltered over an extended period of time.