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Definitions

effectiveness

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




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.

There’s a chunk of code for a memory system to keep the context of conversations going without overloading the AI with too much information—a problem known to amplify hallucinations and reduce the effectiveness of guardrails.

From The Wall Street Journal • Apr. 17, 2026

In March 2025, Kennedy issued a statement that noted vaccines’ effectiveness in preventing measles’ spread, but stopped short of outright recommending that parents vaccinate their children.

From Los Angeles Times • Apr. 16, 2026

It claimed "stopping full-time pay for part-time work... could increase capacity and the effectiveness of current staff and allow for headcount reduction", which would "save around £270,000".

From BBC • Apr. 9, 2026

Intense competition is pushing manufacturers to improve effectiveness while slashing costs, sometimes to less than $1,000 per unit, making them "affordable", Myronenko said.

From Barron's • Apr. 9, 2026

The Forest Biology Division agreed to modify the spraying program in every possible way short of destroying its effectiveness, in order to reduce risks to the fish.

From "Silent Spring" by Rachel Carson




Vocabulary lists containing effectiveness