# Definition of Entropy. Meaning of Entropy. Synonyms of Entropy

Here you will find one or more explanations in English for the word Entropy. Also in the bottom left of the page several parts of wikipedia pages related to the word Entropy and, of course, Entropy synonyms and on the right images related to the word Entropy.

## Definition of Entropy

Entropy
Entropy En"tro*py, n. [Gr. ? a turning in; ? in + ? a turn, fr. ? to turn.] (Thermodynamics) A certain property of a body, expressed as a measurable quantity, such that when there is no communication of heat the quantity remains constant, but when heat enters or leaves the body the quantity increases or diminishes. If a small amount, h, of heat enters the body when its temperature is t in the thermodynamic scale the entropy of the body is increased by h ? t. The entropy is regarded as measured from some standard temperature and pressure. Sometimes called the thermodynamic function. The entropy of the universe tends towards a maximum. --Clausius.

## Meaning of Entropy from wikipedia

- Entropy is a scientific concept as well as a measurable physical property that is most commonly ****ociated with a state of disorder, randomness, or uncertainty...
- In information theory, the entropy of a random variable is the average level of "information", "surprise", or "uncertainty" inherent to the variable's...
- thermodynamic equilibrium where the entropy is highest at the given internal energy. An increase in the combined entropy of system and surroundings accounts...
- In information theory, the cross-entropy between two probability distributions p {\displaystyle p} and q {\displaystyle q} over the same underlying set...
- Q ) {\displaystyle D_{\text{KL}}(P\parallel Q)} (also called relative entropy and I-divergence), is a statistical distance: a measure of how one probability...
- and electrical engineering. A key measure in information theory is entropy. Entropy quantifies the amount of uncertainty involved in the value of a random...
- unavailable as a source for useful work. Entropy may also refer to: Entropy (classical thermodynamics), thermodynamic entropy in macroscopic terms, with less emphasis...
- constant, and in Planck's law of black-body radiation and Boltzmann's entropy formula, and is used in calculating thermal noise in resistors. The Boltzmann...
- theory, the Rényi entropy generalizes the Hartley entropy, the Shannon entropy, the collision entropy and the min-entropy. Entropies quantify the diversity...
- Maximum entropy thermodynamics Law of maximum entropy production Maximum entropy spectral estimation Principle of maximum entropy Maximum entropy probability...