Thesaurus.com
Dictionary.com
Showing results for efficacy. Search instead for efficac.
Definitions

efficacy

[ef-i-kuh-see] / ˈɛf ɪ kə si /


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.

“The risk is that constant flip-flopping and headline fatigue is starting to seriously undermine the efficacy of the ‘Trump put,’” Barclays analysts said in an equity research note Friday.

From MarketWatch • Mar. 27, 2026

Analysts at the investment bank acknowledge that therapy efficacy data is encouraging but stress that there will be no near-term material impact on the Australia-listed hearing-implant maker.

From The Wall Street Journal • Mar. 25, 2026

The biotech company released positive data for a Phase 2 study evaluating the efficacy of zumilokibart, a monoclonal antibody targeting proteins related to inflammation, in patients with atopic dermatitis.

From Barron's • Mar. 23, 2026

"This is a pilot across Scotland to help inform the UK screening committee about its efficacy and to allow them to take a further recommendation about its wider rollout."

From BBC • Mar. 22, 2026

But there’ll always be some people who will do extremely well, and they will loudly swear to the efficacy of whatever system they’ve used.

From "Innumeracy: Mathematical Illiteracy and Its Consequences" by John Allen Paulos