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Showing results for efficiency. Search instead for efficienci.
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.

Rent increases will only be permitted "where landlords deliver genuine improvements to homes, particularly upgrades that improve energy efficiency and reduce carbon emissions".

From BBC • Apr. 7, 2026

Market efficiency is one of the most important ideas in finance, but investors can take it too literally.

From The Wall Street Journal • Apr. 7, 2026

Texas, which is fifth in the nation in offensive efficiency, shot just 25% during the first half.

From Los Angeles Times • Apr. 4, 2026

Analyst Nitin Kumar rates Diamondback a Buy with a $220 target, citing its U.S. shale leadership and increased efficiency.

From Barron's • Apr. 2, 2026

They worked with military efficiency as the hare rapped out orders.

From "Redwall" by Brian Jacques

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.