effectiveness

noun

Definition of effectivenessnext
1
as in conclusiveness
the capacity to persuade the "guilty" verdict was all the proof needed of the effectiveness of the prosecutor's closing argument

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms
2
as in efficacy
the power to produce a desired result the huge upsurge in sales pretty much demonstrated the effectiveness of the new ad campaign

Synonyms & Similar Words

Antonyms & Near Antonyms
3
as in impact
the quality of an utterance that provokes interest and produces an effect your writing lacks effectiveness because practically every sentence is in the passive voice

Synonyms & Similar Words

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of effectiveness The Policy Analysis Market (PAM) designed by Polk’s research firm, Net Exchange, for DARPA’s Information Awareness Office was one of many answers to questions raised about the effectiveness of US intelligence following 9/11. — Simon Denny, Artforum, 1 Oct. 2026 Beauty’s average audience size declined 30% year over year, while content performance slipped 1%, suggesting that effectiveness increasingly depends on creator quality rather than quantity. — Fernanda Tronco, Fortune, 1 Oct. 2026 Utah and West Virginia both installed taxes on the products to pay for the services, which increased the rules’ effectiveness, Kaufman said. — Theresa Gaffney, STAT, 30 Sep. 2026 Ukrainian officials didn’t specifically confirm those strikes, as Kyiv wants to deny Moscow intelligence about the effectiveness of its attacks. — Hanna Arhirova, Los Angeles Times, 30 Sep. 2026 The evidence is compelling that leadership effectiveness correlates with business performance. — Bill Koch, Forbes.com, 29 Sep. 2026 More research is still needed to confirm effectiveness across all of those claimed uses. — Hanna Wickes, Charlotte Observer, 28 Sep. 2026 Dermatologists say results are strongest for people who use the devices consistently, and effectiveness varies by design and bulb count. — Hanna Wickes, Kansas City Star, 28 Sep. 2026 Bell’s effectiveness was pretty representative of the offense as a whole which, despite Achane’s absence, finished with 321 total yards, roughly 13 less than the Chiefs. — Miami Herald, 27 Sep. 2026
Recent Examples of Synonyms for effectiveness
  1. conclusiveness
  2. efficacy
  3. impact
  4. validity
  5. importance
  6. strength
  7. significance
  8. authority
Noun
  • On Friday morning, Burke’s defense team tried to sow doubt about the conclusiveness of the autopsy conducted in the case.
    — Richard Winton, Los Angeles Times, 24 July 2026
  • But his dictionary, with its conclusiveness, was a huge publishing success.
    — Louis Menand, New Yorker, 22 Dec. 2025
Definition of conclusiveness
Noun
  • Immunity from flu vaccination is generally thought to last for around four to six months before losing some efficacy, according to the CDC.
    — Stephen Underwood, Hartford Courant, 2 Oct. 2026
  • Those figures are based on efficacy analysis that assumes patients remained on treatment in the trial.
    — Annika Kim Constantino, CNBC, 2 Oct. 2026
Definition of efficacy
Noun
  • At Duke University, meanwhile, the Neuroartifact project is using neuroscience and AI to better understand the cognitive impact of archaeological artifacts.
    — Jacqueline Ortoleva, Scientific American, 3 Oct. 2026
  • Executives from French media and entertainment group Mediawan Group, whose production banner portfolio includes Brad Pitt’s Plan B Entertainment, were among the people on stage getting quizzed about the impact of mega-mergers.
    — Georg Szalai, HollywoodReporter, 2 Oct. 2026
Definition of impact
Noun
  • The canvassing board is made up of Garcia and two county judges, and is responsible for determining the validity of ballots and whether they should be counted.
    — Joshua Ceballos, Miami Herald, 2 Oct. 2026
  • There’s a distrust in the validity of big data, with everything seeming more vulnerable than ever to outside influence by unseen forces with specific agendas.
    — Andrew Unterberger, Billboard, 29 Sep. 2026
Definition of validity
Noun
  • What readers are saying The comments on the article discuss the importance and challenges of effective listening, particularly reflective or active listening.
    — Maggie Penman, Washington Post, 2 Oct. 2026
  • The project helped bring attention to regenerative farming and the importance of maintaining a sustainable ecosystem where people and animals can thrive together.
    — Ryan Gajewski, HollywoodReporter, 2 Oct. 2026
Definition of importance
Noun
  • Anton’s investment in The Creatives reinforces the financial strength of the group and provides additional access to equity financing.
    — Rafa Sales Ross, Variety, 30 Sep. 2026
  • Yet Washington remains focused on containing China’s rise rather than investing in the strengths of America and our allies.
    — Patrick McHenry, STAT, 30 Sep. 2026
Definition of strength
Noun
  • The remark underscores the central significance of Serra’s text—of language—to the content of Shift.
    — Jeffrey Weiss, Artforum, 1 Oct. 2026
  • For Meyer, who was born and raised in Los Angeles and grew up on the Westside, reopening in the Palisades also carried personal significance.
    — Ryma Chikhoune, Footwear News, 1 Oct. 2026
Definition of significance
Noun
  • And although American vagrancy laws were deemed unconstitutionally vague and overturned in 1972, police maintained the authority to make arrests based on suspicious types of nonaction.
    — Sophie Landres, Artforum, 1 Oct. 2026
  • Michael Buschbacher, a partner at the law firm Boyden Gray, said states do now and will still have authority over mitigating climate change and greenhouse gas emissions within their own borders.
    — Callie Patteson, The Washington Examiner, 1 Oct. 2026
Definition of authority

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effectively
effectiveness
effects
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Cite this Entry

“Effectiveness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/effectiveness. Accessed 7 Oct. 2026.

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