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Synonyms

efficiency

American  
[ih-fish-uhn-see] / ɪˈfɪʃ ən si /

noun

plural

efficiencies
  1. the state or quality of being efficient, or able to accomplish something with the least waste of time and effort; competency in performance.

  2. accomplishment of or ability to accomplish a job with a minimum expenditure of time and effort.

    The assembly line increased industry's efficiency.

  3. the ratio of the work done or energy developed by a machine, engine, etc., to the energy supplied to it, usually expressed as a percentage.

  4. efficiency apartment.


efficiency British  
/ ɪˈfɪʃənsɪ /

noun

  1. the quality or state of being efficient; competence; effectiveness

  2. the ratio of the useful work done by a machine, engine, device, etc, to the energy supplied to it, often expressed as a percentage See also thermal efficiency

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

efficiency Scientific  
/ ĭ-fĭshən-sē /
  1. The ratio of the energy delivered (or work done) by a machine to the energy needed (or work required) in operating the machine. The efficiency of any machine is always less than one due to forces such as friction that use up energy unproductively.

  2. See also mechanical advantage

  3. The ratio of the effective or useful output to the total input in any system.


Other Word Forms

  • nonefficiency noun
  • superefficiency noun

Etymology

Origin of efficiency

First recorded in 1585–95; from Latin efficientia, from efficient- (stem of efficiēns efficient ) + -ia -y 3

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In light of expected savings of 250 million euros from an efficiency program, this points to intensifying headwinds elsewhere, Jefferies says in a research note.

From The Wall Street Journal

In his view, although alternatives have been available for decades, clients are sticking with mainframe for a host of reasons: reliability and speed advantages, better cost efficiency at scale, and security such as quantum-safe encryption.

From Barron's

There have no doubt been some efficiencies, but there are no massive savings.

From MarketWatch

With healthy capacity expansion, higher efficiency and end-to-end logistics solutions, incumbent private players are poised to gain traffic share.

From The Wall Street Journal

As part of the efficiency push, Roku is applying artificial intelligence more broadly across the workplace.

From The Wall Street Journal