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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 most effective efforts pair financial or human capital investments with social capital—mentors, networks and institutions that connect people to opportunity.

From The Wall Street Journal • Jun. 4, 2026

Pancreatic cancer is so deadly in part because there are no effective screening tests, and it rarely causes noticeable symptoms in its earliest stages.

From Science Daily • Jun. 4, 2026

According to FactSet, the Bloomberg High Yield Index has a yield-to-worst of 7.01%, while the Bloomberg Aggregate Index has a yield-to-worst of 4.70% and an effective duration of 5.97.

From MarketWatch • Jun. 2, 2026

The government says the trial will help build a more effective screening system for the disease for the future.

From BBC • Jun. 2, 2026

I bought a new shotgun, which I always kept at hand, and the Walmart in Wasilla started carrying an anti-bear spray that was very effective, which I carried in a holster on my belt.

From This Side of Wild by Gary Paulsen




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