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Definition of Efficiency

Babylon English

competence, productivity (without waste of time or effort); hotel room having a small kitchen area and a table
Efficiency Definition from Arts & Humanities Dictionaries & Glossaries
Lighting efficiency is measured in terms of lumens per watt - the amount of light produced for each watt of electricity consumed.
Efficiency Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
The ratio of useful work to energy expended.
The quality of being efficient or producing an effect or effects; efficient power; effectual agency.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
hEnglish - advanced version

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]

  similar words(1) 

 with efficiency 
for Vocabulary Exams of KPDS, YDS,UDS (in Turkey); and SAT in America
The state of possessing adequate skill or knowledge for the performance of a duty.
Concise English-Irish Dictionary v. 1.1
WordNet 2.0

1. the ratio of the output to the input of any system
(hypernym) ratio
2. skillfulness in avoiding wasted time and effort; "she did the work with great efficiency"
(antonym) inefficiency
(hypernym) skillfulness
(hyponym) economy
Efficiency Definition from Business & Finance Dictionaries & Glossaries
Big Dog's Leadership Page - Glossary
A measure (as a percentage) of the actual output to the standard output expected. Efficiency measures how well someone is performing relative to expectations.
The ratio of the output to the total input in a process.
Campbell R. Harvey's Hypertextual Finance Glossary
The degree and speed to which a market accurately incorporates information into prices.
Copyright © 2000, Campbell R. Harvey. All Rights Reserved.
Sean_Woo's Finance,GIS & Real Estate Glossary
the property that society can get the most from its scarce resources.
eg: efficiency refers to the size of the economic pie, and equity refers to how the pie is divided.
A Guide to Futures and Options Market Terminology : English-English
Because of futures contracts' standardization of terms, large numbers of traders from all walks of life may trade futures, thus allowing prices to be determined readily (it is more likely that someone will want a contract at any given price). The more readily prices are discovered, the more efficient are the markets.
Efficiency Definition from Social Science Dictionaries & Glossaries
Environmental Economics Glossary
The allocation of goods to their uses of highest relative value.
A Glossary of Political Economy Terms
In an economic sense, the ratio or proportionality between the value of the human end achieved ("benefits" or "satisfactions") and the value of the scarce resources expended to achieve it ("opportunity costs"). When an economist calls a situation or a practice "inefficient," he is claiming that we could achieve exactly the same desired goals with the expenditure of fewer scarce resources, or, put another way, that the amount of resources being employed could potentially produce even more of the beneficial results intended than they do. Efficiency simply means making the most we can of the limited resources we have.

Notice that "efficiency" in the economist's sense is an inherently evaluative term, not a matter of mere technical or scientific measurement of objective physical quantities, as the term might be used in an engineering context (as for example, the "efficiency" of various kinds of steam engine in transforming heat energy to useful kinetic energy). "Value of" always requires some sort of answer to the question "value to whom." When we assess the efficiency of any process or social institution or practice, just whose evaluations of the means and the ends are we using? In a well-developed market economy, assessment of economic efficiency makes heavy use of the monetary values placed on the various inputs and the resulting outputs in the open marketplace. The valuations that count are thus the valuations of those who are willing and able to support their preferences by spending their money in the ways that seem to them most likely to maximize their own satisfactions or "utility" based on their own individual tastes and preferences. The evidence that any particular economic resource is being used efficiently is, in the end, the fact that no one finds it "worth his while" to bid up the price and pay more in order to divert it to some other use.

The logical and philosophical elaboration of the idea that competitive market systems are highly efficient in a much broader sense even than this is the primary content of Adam Smith's classic work The Wealth of Nations (1776). Indeed the entire subdivision of today's economic science known as "welfare economics" specializes primarily in identifying and analyzing the necessary preconditions for voluntary market interactions to generate socially efficient outcomes (and in examining the possibilities for remedies by deliberate state economic policies where those necessary preconditions may not be fully met).

Learning, Performance and Training Definitions
A measure (as a percentage) of the actual output to the standard output expected. Efficiency measures how well someone is performing relative to expectations.
Donald Clark
Efficiency Definition from Science & Technology Dictionaries & Glossaries
NRC Nuclear Energy Glossary
The percentage of the total energy content of a power plant's fuel that is converted into electricity. The remaining energy is lost to the environment as heat.
A service to the public by The U.S. Nuclear Regulatory Commission (NRC).
EIA Energy Glossary
Refers to programs that are aimed at reducing the energy used by specific end-use devices and systems, typically without affecting the services provided. These programs reduce overall electricity consumption (reported in megawatthours), often without explicit consideration for the timing of program-induced savings. Such savings are generally achieved by substituting technologically more advanced equipment to produce the same level of end-use services (e.g. lighting, heating, motor drive) with less electricity. Examples include high-efficiency appliances, efficient lighting programs, high-efficiency heating, ventilating and air conditioning (HVAC) systems or control modifications, efficient building design, advanced electric motor drives, and heat recovery systems.
Source: Energy Information Administration, 2006
Web Dictionary of Cybernetics and Systems
(l) Program A is said to be more efficient than program B if, for a given cost, a chosen aggregated measure of its positive results (such as effectiveness or benefit ) is greater than that for program B. (IIASA)
(2) A ratio scale measurement of a measure of performance to resources expended to obtain the level of performance. (Turoff)
Relationship between input and output, whereby either the largest possible output has to be achieved on the basis of a given input (maximisation principle) or the least possible input on the basis of a given output (minimization principle). (Hornung )
Dictionary of Automotive Terms
The accomplishment of something with the least amount of effort. See fuel efficiency , mechanical efficiency , thermal efficiency , and volumetric efficiency .
Fishery Glossary
In general, efficiency is the ratio of a system+s output (or production) to input, as in the useful energy produced by a system compared to the energy put in the system. In ecology, it is the percentage of useful energy transferred from one trophic level to the next (as in the ratio of production of herbivores to that of primary producers). Used in the context of production, efficiency is the ratio of useful work performed to the total energy expended, thus avoiding waste generation. In the context of the allocation of resources, efficiency is the condition which would make at least one person better off and no one worse off. This implies that some may get richer and others not improve their status. Scialabba (1998)
Glossary of liquid chromatographic terms
(N or H). A measure determined by the number of theoretical plates calculated from the equation shown for H (see HETP).
Efficiency Definition from Computer & Internet Dictionaries & Glossaries
Sound Escape Glossary of Terms
Indicates how well a speaker system converts power into sound. This is measured by sending one watt of power and measuring the decibels at one meter distance. The higher the number the more efficient (i.e. louder) the speaker. Just to be clear: efficiency measures the quantity not the quality of the produced sound.
Efficiency Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Efficiency is the (often measurable) ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result. In a more general sense, it is the ability to do things well, successfully, and without waste. In more mathematical or scientific terms, it is a measure of the extent to which input is well used for an intended task or function (output). It often specifically comprises the capability of a specific application of effort to produce a specific outcome with a minimum amount or quantity of waste, expense, or unnecessary effort. Efficiency of course refers to very different inputs and outputs in different fields and industries.

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Efficiency Definition from Society & Culture Dictionaries & Glossaries
Environmental Engineering (English ver.)
(Irrigation) A measure of a distribution system's ability to transport and apply water to a desired effect with a minimum of effort, expense, or waste. With respect to irrigation project efficiency, the following terms generally apply: (1) Canal Efficiency: The volume of water diverted into a canal system versus total water available for farm headgate deliveries; (2) Irrigation Efficiency: The percentage of water applied that can be accounted for in soil moisture increase; and (3) Farm Efficiency: The amount of water actually required for growing a crop compared to the amount of irrigation water that is diverted at the farm headgate.
Efficiency Definition from Entertainment & Music Dictionaries & Glossaries
Guitar Glossary
In a loudspeaker, the ratio of acoustic power output to electrical power input.
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