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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.

It would be negligent to write about Arsenal beating a direct opponent without mentioning their most effective tool this season.

From BBC • May 30, 2026

Because hydrogen remains stable at very low temperatures, the researchers found it could act as an effective insulating blanket around these moons, helping them hold onto heat for billions of years.

From Science Daily • May 29, 2026

“It’s hard for intervention to stay effective unless there’s something big enough to flip market sentiment and expectations upside down,” former Bank of Japan Gov. Haruhiko Kuroda said earlier this month.

From The Wall Street Journal • May 29, 2026

As Luna aims to show that he has been an effective leader, Villanueva tells a far different story.

From Los Angeles Times • May 28, 2026

But it took thousands of years to build such huge and effective political structures.

From "Sapiens: A Brief History of Humankind" by Yuval Noah Harari




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