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Definitions

effectiveness

[ih-fek-tiv-nis, ee-fek‐] / ɪˈfɛk tɪv nɪs, iˈfɛk‐ /




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.

Also, doubts remain about the effectiveness of the U.S.-Iran cease-fire agreement and the progress of peace negotiations, the strategists add.

From The Wall Street Journal • Apr. 10, 2026

By analysing millions of their genetic variants, the researchers found a pattern suggesting a link between some variants and the effectiveness of the drugs.

From BBC • Apr. 8, 2026

Nine biosimilars — which are FDA-approved drugs with the same safety, effectiveness and treatment benefits as the original drug — flooded the market at substantially lower prices.

From MarketWatch • Apr. 7, 2026

They can also be engineered to carry multiple components, increasing their potential effectiveness.

From Science Daily • Apr. 2, 2026

The psychologist Nalini Ambady once gave students three ten-second videotapes of a teacher—with the sound turned off—and found they had no difficulty at all coming up with a rating of the teacher’s effectiveness.

From "Blink" by Malcolm Gladwell




Vocabulary lists containing effectiveness