• WordNet 3.6
    • adj efficient able to accomplish a purpose; functioning effectively "people who will do nothing unless they get something out of it for themselves are often highly effective persons..."-G.B.Shaw","effective personnel","an efficient secretary","the efficient cause of the revolution"
    • adj efficient being effective without wasting time or effort or expense "an efficient production manager","efficient engines save gas"
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: Keeping your car tuned up is a good way to save on gas. A car that is tuned up is 9% more efficient on gasoline.
    • n Efficient An efficient cause; a prime mover. "God . . . moveth mere natural agents as an efficient only."
    • a efficient Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack, or incapable; characterized by energetic and useful activity; as, an efficient officer, power. "The efficient cause is the working cause."
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: Apples, not caffeine, are more efficient at waking you up in the morning
    • efficient Producing outward effects; of a nature to produce a result; active; causative.
    • efficient Acting or able to act with due effect; adequate in performance; bringing to bear the requisite knowledge, skill, and industry; capable; competent: as, an efficient workman, director, or commander.
    • efficient Synonyms Efficacious, Effectual, etc. (see effective); energetic, operative, active, ready, helpful.
    • n efficient An efficient cause (see above).
    • n efficient One who is efficient or qualified; specifically, in the volunteer service of Great Britain, one who has attended the requisite number of drills, and in respect of whom the corps receives the capitation grant paid by government.
    • n efficient In mathematics, a quantity multiplied by another quantity to produce the quantity of which it is said to be an efficient; a factor.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: The reason why bubbles are round is because this is the most efficient shape that the soap film can take for the amount of air trapped inside
    • adj Efficient ef-fish′ent capable of producing the desired result: effective
    • n Efficient the person or thing that effects
    • ***


  • Kin Hubbard
    “It's pretty hard to be efficient without being obnoxious.”
  • Herbert N. Casson
    Herbert N. Casson
    “The men who succeed are the efficient few. They are the few who have the ambition and will power to develop themselves.”
  • Eugene J. Mccarthy
    Eugene J. Mccarthy
    “The only thing that saves us from the bureaucracy is inefficiency. An efficient bureaucracy is the greatest threat to liberty.”
  • John F. Kennedy
    “Washington is a city of Southern efficiency and Northern charm.”
  • Benjamin Disraeli
    “There can be economy only where there is efficiency.”
  • Peter F. Drucker
    “Efficiency is doing better what is already being done.”


Webster's Revised Unabridged Dictionary
L. efficiens, -entis, p. pr. of efficere, to effect: cf. F. efficient,. See Effect (n.)


In literature:

How has the movement demanding efficiency in religious education affected Negro institutions?
"The Journal of Negro History, Volume 5, 1920" by Various
Efficiency is the ability to perform work in the shortest and quickest way, by omitting every useless movement.
"The Choctaw Freedmen" by Robert Elliott Flickinger
Our stern and efficient admiral lit into them like a gull into a school of herring.
"The U-boat hunters" by James B. Connolly
But fuel-efficient maneuvers are rarely time-efficient ones.
"The Pirates of Ersatz" by Murray Leinster
If oiling had improved the machine, its previous efficiency must have been slight.
"Greener Than You Think" by Ward Moore
She would have preferred calmer, more efficient common sense.
"The Life of Napoleon Bonaparte" by William Milligan Sloane
In other cases the stay has been too brief to have admitted of efficient service.
"Life and Work in Benares and Kumaon, 1839-1877" by James Kennedy
It was an experience I shall never forget, and it impressed me enormously with the efficiency and power of the German cavalry.
"1914" by John French, Viscount of Ypres
Phormio was a naval officer by profession, and he won by genius combined with superior efficiency in the personnel under his command.
"A History of Sea Power" by William Oliver Stevens and Allan Westcott
The labor turnover, from the point of view of production and efficiency, can well be a vital industrial concern.
"Working With the Working Woman" by Cornelia Stratton Parker

In poetry:

Unquestioned those, efficient these,
All costs and fees enforced,
The Court now orders and decrees
John Marshall is divorced.
"John Marshall's Divorce" by Samuel Alfred Beadle
By it they stand, by it they fall,
What e'er the ambiguities,
They look to its intrinsic call,
For metes and bounds efficiencies.
"The Deed Vs. Assessment Rolls" by Samuel Alfred Beadle

In news:

If that trend continues, the advantage for super-efficient web browsers like Opera may diminish.
Efficient water usage will be the emphasis of a University of Nebraska-Lincoln Extension conference scheduled Sept 1 at a new university facility in Brule .
Energy Efficiency Changes Proposed for Utah Building Code .
But that's not the case with the historic new building efficiency standards approved unanimously by the California Energy Commission on Thursday.
A new model code for constructing and remodeling buildings is expected to make buildings more efficient, reduce waste, and have a positive impact on health, safety, and community welfare.
THE BUMBLE BEE HIGH-EFFICIENCY CIRCULATOR is a variable speed, wet-rotor circulator that uses the latest in ECM, permanent magnet motor technology.
Meanwhile, an intelligence reorganization that was supposed to improve efficiency has made the bureaucracy problem worse.
MSOE's SuperMileage team came in 11th place in a worldwide competition to make efficient single-person automobiles.
Under pressure to operate more efficiently after the housing bust, Cemex used social collaboration to connect its worldwide employees.
Jim Sales believes the department should be run "like a business" and that with "tax dollars shrinking" fire services across the country must "find efficiencies" and "do more with less.".
ONE of the secrets of efficient and quick cooking is to combine tasks when possible.
TWIN FALLS, Idaho — Idaho officials are preparing to launch a program that proponents say enhances the efficiency of care for Medicaid recipients while decreasing costs.
A Clinician 's View of Hospital Economic Efficiency.
2 UMHB efficiently thrashes Louisiana College 59-20 to start playoff drive.
Coaxial Resonator Oscillator Maximizes Performance and Efficiency.

In science:

Barr, R. 2004 An Efficient, Unifying Approach to Simulation Using Virtual Machines.
Content Sharing for Mobile Devices
Barr, R., Haas, Z. J., and van Renesse, R. 2005. JiST: an efficient approach to simulation using virtual machines: Research Articles.
Content Sharing for Mobile Devices
Chen, Y. and Schwan, K. 2005. Opportunistic overlays: Efficient content delivery in mobile ad hoc networks.
Content Sharing for Mobile Devices
We obtain dark count rates and quantum efficiencies of the order of 10-6 per ns and 10%, respectively.
High speed coherent one-way quantum key distribution prototype
The results are summarised in Figure 5b, where you can see the secret key rate as a function of fibre loss. We see some fluctuations about the theoretical value that is in part due to detector efficiency’s sensitivity to polarisation.
High speed coherent one-way quantum key distribution prototype