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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.

See Examples For:

She said people should seek medical advice as soon as symptoms appear because swab testing is most effective within about 48 hours, but added that accessing clinics was a challenge.

From BBC Jul. 29, 2026

Social insects including bees rely on cooling behavior for example fanning their wings when things get too hot to buffer the hive but there are limits as to how effective this is in extreme heat.

From Science Daily Jul. 29, 2026

“It felt like we weren’t making any progress toward retirement for a few years, but in reality, it was the most effective use of our savings budget at the time.”

From MarketWatch Jul. 28, 2026

Anandkumar said the facility “does not appear to have adequate staffing, stable on-site management, sufficient clinical and operational oversight, or an effective quality assurance process to identify and promptly address care-related problems.”

From Los Angeles Times Jul. 28, 2026

Would not the magic have been equally effective if the “killing” had been practiced upon less realistic images?

From "History of Art, Volume 1" by H.W. Janson




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