(communication theory) a numerical measure of the uncertainty of an outcome
"the signal contained thousands of bits of information"
(thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work
"entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity"
A measure of the disorder present in a system.
"As the room got messier, my friend joked that its entropy was rising rapidly."