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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.

Based on earlier research, Yassine and his colleagues suspect that omega-3s may be more effective when consumed as part of an overall Mediterranean-style eating pattern rather than as a standalone supplement.

From Science Daily • Jun. 29, 2026

His three goals here have taken his international tally to nine in 12 matches—though even that undersells how effective he is since he has spent most of those on the bench.

From The Wall Street Journal • Jun. 29, 2026

“The AI3 computer only has about 15% of the effective memory bandwidth of AI4, so this was a tough challenge.”

From Barron's • Jun. 29, 2026

“When we have identified fully effective, scalable solutions across the entire portfolio, we will share additional item commitments and timelines,” Mars said, per WSJ.

From Salon • Jun. 29, 2026

Savery’s engine, and Papin’s second engine, needed to build up a high pressure in order to be effective but, in practice, boilers and cylinders could not be made that withstood such pressure.

From "The Invention of Science" by David Wootton




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