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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.

The earnings upgrade is partly offset by higher capital expenditure and an elevated 39.1% effective tax rate, the analyst adds.

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

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

In a website statement, WellBN said it recognised "the seriousness and sensitivity of the matters raised" and that its priority remained providing "compassionate, safe and effective care for all patients".

From BBC • Jun. 11, 2026

These goals and objectives are used in lesson planning to focus the lesson, and to aid in effective assessment.

From "Music and the Child" by Natalie Sarrazin




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