as in effectiveness
the power to produce a desired result
questioned the efficacy of the alarms in actually preventing auto theft
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Recent Examples of efficacy
The biotech soared 35% after saying its TETON-2 study evaluating the use of nebulized Tyvaso (treprostinil) Inhalation Solution to treat idiopathic pulmonary fibrosis met its primary efficacy endpoint .
—
Christina Cheddar Berk, CNBC, 2 Sep. 2025
At the time, Tedros Adhanom Ghebreyesus, the director-general of the WHO, pushed back on the notion that anyone was moving slowly, saying WHO experts didn't have complete information with which to assess the efficacy and safety of the vaccines.
—Gabrielle Emanuel, NPR, 2 Sep. 2025
The programs administered by CP3 were aimed at bolstering local communities in recognizing those kinds of signs – though there has long been criticism of their efficacy.
—Curt Devine, CNN Money, 30 Aug. 2025
Further studies are needed to explore ecnoglutide's efficacy across diverse populations and in combination with other antidiabetic agents.
—Hannah Millington, MSNBC Newsweek, 27 Aug. 2025
See All Example Sentences for efficacy
Christina Cheddar Berk, CNBC, 2 Sep. 2025
At the time, Tedros Adhanom Ghebreyesus, the director-general of the WHO, pushed back on the notion that anyone was moving slowly, saying WHO experts didn't have complete information with which to assess the efficacy and safety of the vaccines.
—Gabrielle Emanuel, NPR, 2 Sep. 2025
The programs administered by CP3 were aimed at bolstering local communities in recognizing those kinds of signs – though there has long been criticism of their efficacy.
—Curt Devine, CNN Money, 30 Aug. 2025
Further studies are needed to explore ecnoglutide's efficacy across diverse populations and in combination with other antidiabetic agents.
—Hannah Millington, MSNBC Newsweek, 27 Aug. 2025
See All Example Sentences for efficacy
Recent Examples of Synonyms for efficacy
Noun
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Davis said that the center has been around for 50 years speaks to its effectiveness in helping people achieve their goals.—
Miami Herald,
Miami Herald,
9 Sep. 2025
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The money would provide for beginning mechanical removal of the algae mass in the most problematic areas and setting up test areas for the effectiveness of algicides, Miller said.—
Keith Matheny,
Freep.com,
8 Sep. 2025
Noun
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According to the statement, with the backing of PAI, Marcolin has broadened its international reach and enhanced operational efficiency, reinforcing itself as a leading player in the wholesale eyewear market.—
Thomas Waller,
Footwear News,
5 Sep. 2025
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By reducing costs, keeping inflation in check, improving efficiency, and enabling greater scale, this will create opportunities for every stakeholder in the retail value chain including farmers, MSMEs, producers, suppliers, kiranas (small stores) and the end-consumers.—
Mayu Saini,
Sourcing Journal,
5 Sep. 2025
Cite this Entry
“Efficacy.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/efficacy. Accessed 11 Sep. 2025.
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