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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.

CVS Health’s Aetna said that “when combined with timely clinical information from our provider partners, prior authorization supports safe, effective, and affordable care.”

From The Wall Street Journal • Jun. 11, 2026

This expands current understanding of why mitochondria become less effective over time and highlights membrane lipid dynamics as another important factor in the aging process.

From Science Daily • Jun. 11, 2026

The most effective antipoverty work usually happens when people in local parishes tackle local problems.

From The Wall Street Journal • Jun. 11, 2026

She said fishers were "keen" to have pingers on their nets - but they needed scientific evidence to determine whether they were an effective solution for the long-term.

From BBC • Jun. 10, 2026

I have to say it was always effective in getting Simone back on track.

From "Courage to Soar" by Simone Biles




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