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Synonyms

effectiveness

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

noun

  1. the quality of producing an intended or desired result.

    For maximum effectiveness of your weight loss plan, you need to combine exercise with a healthy diet.

  2. the quality of producing a deep or vivid impression.

    We were struck by the evident appeal and effectiveness of these short, dramatic, upbeat video stories.

  3. a measure of the success of a vaccine or other pharmaceutical when used in the real world, as opposed to the controlled environment of a clinical trial.


Other Word Forms

  • subeffectiveness noun
  • supereffectiveness noun
  • uneffectiveness noun

Etymology

Origin of effectiveness

First recorded in 1600–10; effective ( def. ) + -ness ( def. )

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.

And it also shined a spotlight on Gabbard’s effectiveness in her position, since she basically serves the function of a potted plant.

From Salon

"This partnership has improved intelligence sharing, operational coordination, and the overall effectiveness of Nigerian-led efforts against violent extremist organizations."

From Barron's

She said she hoped students could take some comfort from the speed and effectiveness of the clinical response, which she described as "incredible".

From BBC

Some of its obfuscation capabilities are limited in highly restrictive parts of the world, which may reduce its effectiveness in countries with extreme censorship.

From Salon

Scientists are exploring whether these microbes can be redesigned to fight cancer, although their effectiveness as treatments is still uncertain.

From Science Daily