effectiveness
Americannoun
-
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.
BMO analyst Evan David Seigerman, however, was impressed by retatrutide’s effectiveness at the lowest, four-milligram dose, which wasn’t a part of the earlier trial.
From Barron's • May 21, 2026
They also played up new services — such as NBC’s Performance Insights Hub — providing advertisers with up to date information on the effectiveness of their advertising so they can adjust accordingly.
From Los Angeles Times • May 16, 2026
Amgen said in its quarterly earnings release in late April that the drug “demonstrates effectiveness and a favorable benefit-risk profile,” and said that vanishing bile duct syndrome hadn’t affected patients in the U.S.
From The Wall Street Journal • May 15, 2026
The Department for Culture, Media and Sport has said it would "periodically review" its effectiveness "to ensure that it is fit for purpose".
From BBC • May 13, 2026
The effectiveness of the suffragist and temperance movements would endow American women with more power than they had ever known.
From "1919 The Year That Changed America" by Martin W. Sandler
Definitions 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.
