Hypertext Webster Gateway: "efficiency"

From Webster's Revised Unabridged Dictionary (1913) (web1913)

Efficience \Ef*fi"cience\, Efficiency \Ef*fi"cien*cy\, n. [L.
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.

{Efficiency of a heat engine}, the ratio of the work done an
engine, to the work due to the heat supplied to it.

From WordNet (r) 1.7 (wn)

n 1: the ratio of the output to the input of any system
2: skillfulness in avoiding wasted time and effort; "she did
the work with great efficiency" [ant: {inefficiency}]

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