Entropy.
Definition 4.
A doctrine of inevitable social decline and degeneration
Definition 3 Cosmology
A hypothetical tendency for the universe to reach a state of maximum homogeneity in which all matter is at a uniform temperature
Definition 1 Thermodynamics
A function of thermodynamic variables such as temperature pressure or composition that is a measure of the energy not available for work during a thermodynamic process. A closed system evolves toward a state of maximum entropy
In data transmission and information theory a measure of the loss of information in a transmitted signal (like playing "telephone"?)
If you are a user of that word in which context, to which definition or which of its many meanings do you refer in general?.