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]
- The extent to which time is well used for the intended task.
- The efficiency of the planning department is deplorable.
- The extent to which a resource, such as electricity, is used
for the intended purpose.
- The efficiency of this loudspeaker is 40%.
- A one room apartment.
- I have an efficiency available June through July.
Efficiency as a technical term may refer to:
efficiency, useful work per quantity of energy
- Energy conversion efficiency, desired energy output per energy input
- Energy conservation, reducing the use of energy
- Electrical efficiency, useful power output per electrical power consumed
efficiency, converting energy in fuel to kinetic energy or work
- Specific impulse, in propulsion systems, a measure of fuel-efficiency
- Volumetric efficiency, in internal combustion engine design
- Lighting efficiency, visible light from a light source per unit of energy, in lumens per watt
- Mechanical efficiency, the effectiveness of a simple machine, mechanical advantage over ideal mechanical advantage
- Thermodynamic efficiency, useful work per change in heat
- Radiation efficiency, ratio of radiated power to power absorbed at the terminals of an antenna
- Efficiency (aerodynamics), for fixed wing aircraft the Lift-to-drag ratio
(economics), a general term, to capture the amount of waste or
other undesirable features
- Pareto efficiency, making one individual better off, without making any other individual worse off
- Kaldor-Hicks efficiency, like a less stringent Pareto efficiency
- Allocative efficiency, an optimal distribution of goods
- The optimisation of a social welfare function
- Efficiency wages, paying workers more than the market rate for increased productivity
- Efficiency (statistics), a measure of desirability of an estimator
- Efficiency ratio, expenses as a percentage of revenue, etc.
- Efficiency Movement, of the Progressive Era 1890-1932, advocated efficiency in the economy, society and government
- Material efficiency, compares material requirements between construction projects or physical processes
- Faraday Efficiency, electrolysis
- Textual efficiency, density of a message
- Algorithmic efficiency, the speed and space requirements of a computer program
- Quantum efficiency, a measure of sensitivity of a photosensitive device: the percentage of photons hitting the photoreactive surface that will produce an electron–hole pair
- Efficient (horse), winner of the 2007 Melbourne Cup.
- Efficiency apartment, a one room apartment, also called a Studio apartment
efficiency in Spanish: Eficiencia
efficiency in Italian: Efficienza
efficiency in Hebrew: נצילות
efficiency in Simple English: Efficiency
ability, able, ableness, address, adept, adeptness, adequacy, adroitness, airmanship, applicability, artfulness, artisanship, artistry, availability, bravura, brilliance, caliber, capability, capable, capableness, capacity, cleverness, command, competence, competent, control, coordination, craft, craftsmanship, cunning, deftness, dexterity, dexterousness, dextrousness, diplomacy, effectiveness, effectual, efficacious, efficaciousness, efficacy, efficient, experience, expert, expertise, expertness, facility, faculty, finesse, fitness, fitted, flair, functionality, genius, grace, grip, handiness, helpfulness, horsemanship, ingeniousness, ingenuity, know-how, marksmanship, masterly, mastership, mastery, operability, performance, potency, practicability, practical ability, practical utility, practicality, productivity, proficiency, proficient, profitability, prowess, qualification, qualified, quickness, readiness, resource, resourcefulness, savoir-faire, savvy, seamanship, serviceability, skill, skilled, skillful, skillfulness, style, sufficiency, susceptibility, tact, tactfulness, talent, technical brilliance, technical mastery, technical skill, technique, the goods, the stuff, timing, usability, use, usefulness, utility, utilizability, virtuosity, virtuous, what it takes, wit, wizardry, workmanship