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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.

These results suggest that the compounds remain effective in more realistic tumor environments.

From Science Daily • Jun. 29, 2026

With runners arriving on the blindside of the defenders at the back post, Japan struggled to cope and it was little surprise that Casemiro's equaliser came from this simple but effective ploy.

From BBC • 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

“The ritual is more effective the closer both parties feel to each other!”

From "Kwame Crashes the Underworld" by Craig Kofi Farmer




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