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Definitions

effective

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




Usage

What are other ways to say effective? The adjective effective is applied to a person or a thing that has the power to, or which actually does, produce an effect: an effective boss, remedy, speech. Effectual is used especially of that which produces the effect desired or intended, or a decisive result: An effectual bombardment silenced the enemy. Efficacious suggests the capability of achieving a certain end: an efficacious plan, medicine. Efficient (applied also to persons) implies the skillful use of energy or industry to accomplish desired results with little waste of effort: efficient methods; an efficient manager. 

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.

Cheaper options could be faster to roll out, he said, and other cockpit technologies in development could be more effective at preventing midair collisions.

From The Wall Street Journal • May 31, 2026

For example, if artificial intelligence is so effective at increasing productivity that it leads to widespread AI-related layoffs, that could raise the unemployment rate, reduce consumer spending and spook investors.

From MarketWatch • May 31, 2026

Shankland ran everywhere apart from where he is most effective.

From BBC • May 30, 2026

More research and clinical trials will be needed before scientists know whether CBD could become a safe and effective treatment for people with Alzheimer's disease.

From Science Daily • May 29, 2026

It is simply a practical and effective one if your goal is the acquisition of new knowledge.

From "The Invention of Science" by David Wootton




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