Definitions

from The Century Dictionary.

  • noun Same as efficiency.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The quality of being efficient or producing an effect or effects; efficient power; effectual agency.
  • noun (Mech.) The ratio of useful work to energy expended.
  • noun the ratio of the work done by an engine, to the work due to the heat supplied to it.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Archaic form of efficiency.

Etymologies

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