entropy

noun

1. (countable, uncountable)A measure of the disorder present in a system.
2. (countable, uncountable)A measure of the disorder present in a system.
3. (countable)A measure of the amount of energy in a physical system that cannot be used to do work.

   “Near-synonym: unavailable energy”

4. (countable, uncountable)The capacity factor for thermal energy that is hidden with respect to temperature.
5. (countable, uncountable)The dispersal of energy; how much energy is spread out in a process, or how widely spread out it becomes, at a specific temperature.
6. (countable)A measure of the amount of information and noise present in a signal.
7. (uncountable)The tendency of a system that is left to itself to descend into chaos.