Online English Dictionary and Vocabulary Builder

ENTROPY

1. [n] (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"

2. [n] (communication theory) a numerical measure of the uncertainty of an outcome; "the signal contained thousands of bits of information"

add to myVocab      login      register   

Look up words in the English4Today Online Dictionary and then add them to your personal dictionary (myVocab).

Turn your word lists into tests for yourself, your friends or your students ... add a translation ... make vocabulary sets and flash cards.

All you need to start your own personal dictionary web is a free English4Today membership.



Do you know the meaning of ...


Random Members' Question

Question from:
Kiga in Japan

"In the years in the era B.C., why is the B.C. written after the year, for example, 776 B.C., while A.D. is written before, as in A.D. 392?"

View the answer








English grammar software checks your grammar and spelling, and gives feedback as you write!