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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.

But Institute chief executive Prof Siddarthan Chandran says it is possible that even one of them could also be effective in the brain and we just don't know it yet.

From BBC • May 22, 2026

"Unfortunately, I must submit my resignation, effective June 30," Gabbard, whose job involved coordinating the global security information brought to Trump, wrote in the letter.

From Barron's • 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

Had it heeded a more malevolent sensibility than an instinct to overexplain, it might have been more ruthlessly effective at yucking our yum for road trips.

From Los Angeles Times • May 22, 2026

Even if they had, there was no effective treatment on offer.

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




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