effectiveness
Americannoun
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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.
-
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.
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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
Etymology
Origin of effectiveness
First recorded in 1600–10; effective ( def. ) + -ness ( def. )
Vocabulary lists containing effectiveness
Reading: Informational - Middle School
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Media Literacy - High School
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Media Literacy - Middle School
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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.
She’s also planning to be hands-on manager, using data to assess the city’s effectiveness.
From Los Angeles Times ● Nov. 5, 2026
In January, a House of Lords select committee started a review of the Domestic Abuse Act 2021 to consider its impact and effectiveness.
From BBC ● Nov. 3, 2026
"The evidence so far is that the effectiveness of the ban has been limited," reads Reddit's submission.
From Barron's ● Nov. 3, 2026
This combination may help explain why immunotherapies designed to target PD1 have shown limited effectiveness against pancreatic cancer.
From Science Daily ● Oct. 25, 2026
It was like old Mission Impossible reruns on TV: Your mission, if you decide to accept it, is to get inside this computerized robot, discover how it operates, and neutralize its effectiveness.
From "The Great Gilly Hopkins" by Katherine Paterson
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Get a wordDefinitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
