# Definition of entrophy

**1.** entropy [ n ] (thermodynamics) a measure of the amount of energy in a system that is available for doing work; entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity

__Used in print:__

(Frank Oppenheimer, "Science and Fear-- A Discussion...)

As cells coalesced into organisms , they built new `` unnatural '' and internally controlled environments to cope even more successfully with the **entropy** increasing properties of the external world .

(Harry H. Hull, "The Normal Forces and Their Ther...)

There is a well-known relationship between probability and **entropy** which states that * * f , where \q is the probability that state ( i.e. , volume for an ideal_gas ) could be reached by chance alone .

This conformational_entropy is , in this case , equal to the usual **entropy** , for there are no other changes or other energies involved .

**Synonyms**entropy randomness s

**Related Terms**ectropy physical_property physical_phenomenon conformational_entropy thermodynamics

**2.** entropy [ n ] (communication theory) a numerical measure of the uncertainty of an outcome
__Examples:__
"the signal contained thousands of bits of information"

**Synonyms**information entropy selective_information

**Related Terms**measure information_measure communication_theory

### Similar Spelling

entropyenteropathy

entry

entrap

enteron

enterotomy

enterolith

entrepot

enthrone