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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.

“Are they more effective as a result? Yes.”

From The Wall Street Journal • May 23, 2026

But Prof Chandran and his team believe their work means affordable, effective drugs for neurological conditions could come much sooner.

From BBC • May 22, 2026

It’s been almost three months since the Iran war led to the effective closure of the Strait of Hormuz.

From MarketWatch • May 22, 2026

But even after scientists identify the genes involved, turning that knowledge into effective treatments has remained extremely difficult.

From Science Daily • May 21, 2026

In doing so, she helped weave those agencies into a more effective fighting force.

From "The Woman All Spies Fear" by Amy Butler Greenfield




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