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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.

"At community level, this hasn't been effective," Dr Kamba explained.

From BBC • May 19, 2026

When I’m using AI to help with especially high-stakes research, I take steps that make these accuracy checks even more effective.

From The Wall Street Journal • May 19, 2026

School board member Tanya Ortiz Franklin said the school board remains disciplined and effective.

From Los Angeles Times • May 19, 2026

But as far as second-choice options go, using misoprostol by itself is a remarkably effective alternative.

From Slate • May 18, 2026

The controlled binding and unbinding of iron and oxygen—the cyclical rusting and unrusting of blood—allows effective oxygen delivery into tissues.

From "The Gene" by Siddhartha Mukherjee




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