efficacity

noun

ˌe-fə-ˈka-sə-tē How to pronounce efficacity (audio)
Definition of efficacitynext
as in efficacy
the power to produce a desired result the limited efficacity of the primitive tool as an instrument for cutting raw meat

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of efficacity Employing touchscreens for voting results in the adoption of technology for its own sake rather than to provide efficacity. — Letter Writers, Twin Cities, 10 Nov. 2019
Recent Examples of Synonyms for efficacity
  1. efficacy
  2. effectiveness
Noun
  • Immunity from flu vaccination is generally thought to last for around four to six months before losing some efficacy, according to the CDC.
    — Stephen Underwood, Hartford Courant, 2 Oct. 2026
  • Those figures are based on efficacy analysis that assumes patients remained on treatment in the trial.
    — Annika Kim Constantino, CNBC, 2 Oct. 2026
Definition of efficacy
Noun
  • The agency has repeatedly reaffirmed the pill’s safety and effectiveness over the years, in addition to easing a number of restrictions on the drug, including dropping a requirement that it be dispensed in person.
    — CNN Money, CNN Money, 8 Oct. 2026
  • The agency has repeatedly reaffirmed the pill's safety and effectiveness over the years, in addition to easing a number of restrictions on the drug, including dropping a requirement that it be dispensed in person.
    — CBS News, CBS News, 8 Oct. 2026
Definition of effectiveness

Browse Nearby Words

efficaciousness
efficacity
efficacy
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Cite this Entry

“Efficacity.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/efficacity. Accessed 10 Oct. 2026.

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