Meaning of EFFICIENCY in English

ə̇ˈfishənsē, eˈ-, ēˈ-, -si noun

( -es )

Etymology: Latin efficientia, from efficient-, efficiens (present participle of efficere to bring about, accomplish, effect) + -ia -y — more at effect

1. : the power, characteristic quality, or manner of operation of an efficient cause

it is absurd to credit inert mass with efficiency — James Ward


a. : effectiveness ; especially : capacity to produce desired results with a minimum expenditure of energy, time, money, or materials

increasing recognition of the unfairness of such scales of pay is corroding the efficiency of the economic system — J.A.Hobson

the despairing conclusion that their evil efficiency knows no limits — S.L.A.Marshall

b. : suitability for a task or purpose

the efficiency of the drawing board is in no way impaired — Gadgets Annual

3. : efficient operation as measured by a comparison of actual results with those that could be achieved with the same expenditure of energy

structural changes may take place to enable the respiratory organs to remain in a state of efficiency — W.H.Dowdeswell

the invention of instruments for assessing degrees of efficiency in communication — Barbara Wootton


a. : the ratio of the useful energy delivered by a dynamic system (as a machine, engine, or motor) to the energy supplied to it over the same period or cycle of operation

b. : performance of a task with little or no waste effort

c. : economic productivity : yield — used especially of the average number of times a unit of money serves to effect an exchange in a specified period

d. : the relative effective operation of a biological system as measured by the ratio of energy released in product (as milk, muscular effort, or wool) to the energy consumed (as in food) — called also feed efficiency

4. or efficiency apartment : a small usually furnished apartment having minimal kitchen and bath facilities

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.