Entropy

en·tro·py
Pronunciation: \ˈen-trə-pē\
Function: noun
Etymology: International Scientific Vocabulary 2en- + Greek tropē change, literally, turn, from trepein to turn
Date: 1875

1: a measure of the unavailable energy in a closed thermodynamic system that is also usually considered to be a measure of the system's disorder, that is a property of the system's state, and that varies directly with any reversible change in heat in the system and inversely with the temperature of the system; broadly : the degree of disorder or uncertainty in a system
2 a: the degradation of the matter and energy in the universe to an ultimate state of inert uniformity b: a process of degradation or running down or a trend to disorder
3: chaos, disorganization, randomness
— en·tro·pic \en-ˈtrō-pik, -ˈträ-pik\ adjective
— en·tro·pi·cal·ly \-pi-k(ə-)lē\ adverb