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.

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Other Word Forms

• subeffectiveness noun
• supereffectiveness noun
• uneffectiveness noun

Etymology

Origin of effectiveness

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

Example Sentences

That purpose could be the urge to compel people to surrender their individuality to a pooled consciousness, portrayed with frightening, infuriating effectiveness in this show and “Sinners.”

From Salon

Although earlier systematic reviews have included tramadol, none offered a broad evaluation of both its effectiveness and safety across different types of chronic pain.

From Science Daily

But as long as management continues to improve its product’s effectiveness, that risk will fade.

From Barron's

He said this new information, which will likely remove the recycling label from the cartons, also underscores the effectiveness of the law.

From Los Angeles Times

However, the intended effectiveness of the flu vaccine against symptomatic disease caused by the new subvariant remains uncertain, the World Health Organization said.

From Los Angeles Times

Related Words

• capability
• efficacy
• efficiency
• potency
• power
• success