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.

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

From Salon • Feb. 13, 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

Efficiency, she adds, is also "often the best care for women and their families".

From BBC • Jan. 22, 2026

The drive by the so-called Department of Government Efficiency to reduce the federal workforce in early spring 2025 resulted in the IRS losing roughly one-quarter of its staff.

From MarketWatch • Jan. 8, 2026

It was while she was at the college of architecture that she met Larry McCaslin, who was in Delhi collecting material for his doctoral thesis on “Energy Efficiency in Vernacular Architecture.”

From "The God of Small Things" by Arundhati Roy

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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