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. efficiency(noun)

    the ratio of the output to the input of any system

  2. efficiency(noun)

    skillfulness in avoiding wasted time and effort

    "she did the work with great efficiency"


  1. efficiency(Noun)

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

    The efficiency of the planning department is deplorable.

    Etymology: efficientia

  2. efficiency(Noun)

    The quality of producing an effect or effects.

    Etymology: efficientia

  3. efficiency(Noun)

    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. efficiency(Noun)

    A one-room apartment.

    Etymology: efficientia

Webster Dictionary

  1. Efficiency(noun)

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

    Etymology: [L. efficientia.]

  2. Efficiency(noun)

    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  

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?

  1. Alex
    US English

How to say efficiency in sign language?

  1. efficiency


  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. Russell Baker:

    Is fuel efficiency really what we need most desperatelly I say that what we really need is a car that can be shot when it breaks down.

  2. Marco Rubio:

    Bureaucrats at the VA are not commanding officers. They should never have the authority to order around our returning heroes, as soon as the VA is forced to compete with the private sector providers, it will increase the efficiency, the service and its innovation.

  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 modernisation.

  4. Oleg Belozerov:

    Together with the government and the Russian Railways team, (I plan) to focus on continued efficiency improvements.

  5. Fatih Birol:

    Such a decline in global investment for renewables and energy efficiency combined is worrying, this could threaten the expansion of clean energy needed to meet energy security, climate and clean air goals. While we would need this investment to go up rapidly, it is disappointing to find that it might be falling this year.

Images & Illustrations of efficiency

  1. efficiencyefficiencyefficiencyefficiencyefficiency

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Translations for efficiency

From our Multilingual Translation Dictionary

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