What does efficiency mean?

Definitions for efficiency
ɪˈfɪʃ ən sief·fi·cien·cy

Here are all the possible meanings and translations of the word efficiency.

Princeton's WordNet

  1. efficiencynoun

    the ratio of the output to the input of any system

  2. efficiencynoun

    skillfulness in avoiding wasted time and effort

    "she did the work with great efficiency"


  1. efficiencynoun

    The extent to which time is well used for the intended task.

    The efficiency of the planning department is deplorable.

    Etymology: efficientia

  2. efficiencynoun

    The quality of producing an effect or effects.

    Etymology: efficientia

  3. efficiencynoun

    The extent to which a resource, such as electricity, is used for the intended purpose; the ratio of useful work to energy expended.

    The efficiency of this loudspeaker is 40%.

    Etymology: efficientia

  4. efficiencynoun

    A one-room apartment.

    Etymology: efficientia

Webster Dictionary

  1. Efficiencynoun

    the quality of being efficient or producing an effect or effects; efficient power; effectual agency

    Etymology: [L. efficientia.]

  2. Efficiencynoun

    the ratio of useful work to energy expended

    Etymology: [L. efficientia.]

U.S. National Library of Medicine

  1. Efficiency

    Ratio of output to effort, or the ratio of effort produced to energy expended.

The Standard Electrical Dictionary

  1. Efficiency

    The relation of work done to energy absorbed. A theoretically perfect machine would have the maximum efficiency in which the two qualities named would be equal to each other. Expressed by a coefficient, q. v., the efficiency in such case would be equal to 1. If a machine produced but half the work represented by the energy it absorbed, the rest disappearing in wasteful expenditure, in heating the bearings, in overcoming the resistance of the air and in other ways, its efficiency would be expressed by the coefficient 1/2 or .5, or if one hundred was the basis, by fifty per centum. There are a number of kinds of efficiencies of an electric generator which are given below.

Editors Contribution

  1. efficiency

    The fact and quality of being efficient.

    The efficiency and speed of the work completed was a joy to see, the teamwork and effort was amazing, well done everyone.

    Submitted by MaryC on March 31, 2020  

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British National Corpus

  1. Spoken Corpus Frequency

    Rank popularity for the word 'efficiency' in Spoken Corpus Frequency: #2735

  2. Written Corpus Frequency

    Rank popularity for the word 'efficiency' in Written Corpus Frequency: #4452

  3. Nouns Frequency

    Rank popularity for the word 'efficiency' in Nouns Frequency: #1170

How to pronounce efficiency?

How to say efficiency in sign language?


  1. Chaldean Numerology

    The numerical value of efficiency in Chaldean Numerology is: 4

  2. Pythagorean Numerology

    The numerical value of efficiency in Pythagorean Numerology is: 4

Examples of efficiency in a Sentence

  1. Bernhard Mattes:

    We have plants in Germany, Romania, Spain and in England. Our logistics are geared towards supplying our plants just in time. That’s the basis for the efficiency of production in Europe – of course we want to maintain that.

  2. James Quincey:

    We're focused on maximizing system efficiency by ruthlessly prioritizing to deliver on core [ products ] and key brands, the less complexity there is in [ the supply chain ], the greater the chance for success.

  3. Spokesman Yang Yujun:

    The army is an important force in our military, the setting up of this army mechanism will benefit ... raising management efficiency and accelerate military modernization.

  4. Economy Minister Nadia Calvino:

    These bonds would fund investment in areas such as renewable energy and energy efficiency, or sustainable water and land management, all elements of our National Energy and Climate plan, currently subject to public consultation.

  5. Iain Gault:

    We still can't do the physical work with a drone or crawler, but the efficiency is gained by only putting people in the field when needed.

Images & Illustrations of efficiency

  1. efficiencyefficiencyefficiencyefficiencyefficiency

Popularity rank by frequency of use


Translations for efficiency

From our Multilingual Translation Dictionary

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