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Synonyms

efficient

American  
[ih-fish-uhnt] / ɪˈfɪʃ ənt /

adjective

  1. performing or functioning in the best possible manner with the least waste of time and effort; having and using requisite knowledge, skill, and industry; competent; capable.

    a reliable, efficient assistant.

    Synonyms:
    effectual
  2. satisfactory and economical to use.

    Our new air conditioner is more efficient than our old one.

  3. producing an effect, as a cause; causative.

  4. utilizing a particular commodity or product with the least waste of resources or effort (usually used in combination).

    a fuel-efficient engine.


efficient British  
/ ɪˈfɪʃənt /

adjective

  1. functioning or producing effectively and with the least waste of effort; competent

  2. philosophy producing a direct effect; causative

"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

Usage

What are other ways to say efficient? A person or a thing that is efficient performs or functions in the best possible manner with the least waste of time and effort. But efficient isn’t quite the same as effectual, efficacious, or effective! Find out why on Thesaurus.com. 

Other Word Forms

  • efficiently adverb
  • nonefficient adjective
  • quasi-efficient adjective
  • superefficient adjective
  • unefficient adjective

Etymology

Origin of efficient

First recorded in 1350–1400; Middle English, from Middle French, from Latin efficient- (stem of efficiēns ), equivalent to ef- ef- + fic-, combining form of facere “to make, do 1 ” + -ent- -ent

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.

This will make the wash more efficient and save you time and money by avoiding putting the same things back in again for another wash.

From BBC

The company said its goals for the year ahead were roughly the same as last year — selling more cars, growing adjusted profits, improving customer experience and becoming a more efficient company.

From MarketWatch

This challenge has driven researchers to search for more adaptable and efficient technologies.

From Science Daily

Most efficient among them is residential investment, which leads by seven quarters on average and has the deepest average contraction heading into recessionary periods.

From MarketWatch

The Coco Robotics website, however, describes the delivery bot as being “weather proof” and “engineered for efficient city travel.”

From Los Angeles Times