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1 min, 94 words

noun: entropy; plural noun: entropies; symbol: S

  1. a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work, often interpreted as the degree of disorder or randomness in the system. "the second law of thermodynamics says that entropy always increases with time"
  2. lack of order or predictability; gradual decline into disorder. "a marketplace where entropy reigns supreme"
  3. (in information theory) a logarithmic measure of the rate of transfer of information in a particular message or language.

Everything we build and learn requires constant maintenance and labor.