EFFICIENCY Synonyms: 22 Similar and Opposite Words

efficiency

noun

i-ˈfi-shən-sē

Definition of efficiency

as in efficacy

the power to produce a desired result the proven efficiency of meditation in reducing stress within the company's workforce

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Example Sentences

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Recent Examples of efficiency Rice had a rush efficiency rate of 24 percent against Notre Dame and was at 16 percent entering the fourth quarter. — Pete Sampson, New York Times, 14 Sep. 2026 Even at the most generous estimates of the available water and recycling efficiency, a city of one million people would only last 100 years before all the water runs out. — Martin Elvis, Space.com, 14 Sep. 2026 Two McDonald’s trailers were dispatching Quarter-pounders and Chicken McNuggets with the same military efficiency shown at the restaurants. — Devin Friedman, Rolling Stone, 11 Sep. 2026 Shows promise in testing Tested under simulated conditions, these specialized cells proved exceptionally durable, retaining roughly 96 percent of their efficiency after 300 days of storage. — Mrigakshi Dixit, Interesting Engineering, 11 Sep. 2026 See All Example Sentences for efficiency

Recent Examples of Synonyms for efficiency

Noun

Lack of self-efficacy Lahey explains that kids who never have to deal with the consequences of their actions end up feeling a lack of self-efficacy.

— Cheryl Maguire, Parents, 1 Sep. 2026
The need-to-know this morning Alumis said its experimental treatment for lupus failed to achieve the efficacy goals of a mid-stage clinical trial.

— Helen Branswell, STAT, 1 Sep. 2026

Definition of efficacy

Noun

Now the technique has become mainstream as attackers reap its simplicity and effectiveness in infecting users of PCs and Macs alike.

— Dan Goodin, ArsTechnica, 11 Sep. 2026
The chaotic, violence-laden sequence is but the first of many in a film that aspires to classic Hollywood action movie status but reduces its effectiveness through overkill of both the literal and figurative kind.

— Frank Scheck, HollywoodReporter, 10 Sep. 2026