efficiency

1. n. The quality of being efficient or producing an effect or effects; efficient power; effectual agency. Source: opted

2. n. The ratio of useful work to energy expended. Source: opted

3. n. the ratio of the output to the input of any system Source: wordnet

4. n. skillfulness in avoiding wasted time and effort Source: wordnet

5. 1. The quality of being efficient or producing an effect or effects; efficient power; effectual agency. The manner of this divine efficiency being far above us. Hooker. 2. (Mech.) The ratio of useful work to energy expended. Rankine. Efficiency of a heat engine, the ratio of the work done an engine, to the work due to the heat supplied to it. Source: webster

6. n:100 n. the ratio of the output to the input of any system n. skillfulness in avoiding wasted time and effort Source: ecdict

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