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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.

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Belgium is equipping its F-16s with specialized Thales rocket pods, giving the aircraft a cheaper and more effective option for countering large numbers of drones.

From The Wall Street Journal Sep. 8, 2026

This blood letting can be an effective way to reduce the thickness of the blood.

From BBC Sep. 6, 2026

"By understanding how SET and related PP2A blockers help GBM survive treatment, we can test ways to block that protection and make current therapies more effective."

From Science Daily Sep. 6, 2026

It is also, apparently, extremely effective on people like me.

From Salon Sep. 6, 2026

But what feature of hemoglobin allows it to act as such an effective molecular shuttle?

From "The Gene" by Siddhartha Mukherjee




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