Definitions

efficiency

[ih-fish-uhn-see] / ɪˈfɪʃ ən si /

NOUN

adeptness, effectiveness

Synonyms

STRONGEST

ability adaptability capability competence energy expertise performance productivity readiness skill talent

STRONG

abundance address adequacy capableness competency completeness economy effectualness efficacy facility faculty know-how potency power powerfulness productiveness proficiency prowess quantity resourcefulness response skillfulness suitability suitableness thoroughness

Antonyms

STRONGEST

idleness ignorance impotence inability inadequacy incapability incapacity incompetence ineptness weakness

STRONG

inefficiency lack

WEAK

helplessness ineffectiveness

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.

Efficiency gains had offset population growth and industrial demand stayed subdued.

From MarketWatch • Apr. 8, 2026

I talked with Uber and taxi drivers who are suffering because of all the Department of Government Efficiency firings.

From Salon • Feb. 13, 2026

Grimes left Morgan Stanley a year ago as Musk launched the Department of Government Efficiency, or DOGE.

From The Wall Street Journal • Feb. 10, 2026

The stock has been under pressure because of efforts to reduce government waste, including actions taken by the Department of Government Efficiency.

From Barron's • Jan. 26, 2026

Blacks working on behalf of the company-sponsored Efficiency Clubs could be seen walking through the neighborhood, posting signs on trees declaring the riot to be over.

From "A Few Red Drops: The Chicago Race Riot of 1919" by Claire Hartfield

Vocabulary lists containing efficiency

Word Generation Science - Energy

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"The Veldt" by Ray Bradbury

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The Boy in the Striped Pajamas

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