noun A measure of the disorder present in a system.
noun A measure of the disorder directly proportional to the natural logarithm of the number of microstates yielding an equivalent thermodynamic macrostate.
noun Shannon entropy
noun A measure of the amount of energy in a physical system that cannot be used to do work.
noun The capacity factor for thermal energy that is hidden with respect to temperature.
noun The dispersal of energy; how much energy is spread out in a process, or how widely spread out it becomes, at a specific temperature.
noun A measure of the amount of information and noise present in a signal.
noun The tendency of a system that is left to itself to descend into chaos.