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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.

Aid returning to Ituri with Ebola-specific funding would be more effective if public health aid simply hadn’t left in the first place.

From Slate • Jun. 9, 2026

Eli Lilly LLY 0.55%increase; green up pointing triangle shares rose in early European trade after a late-stage trial showed its drug was effective in weight loss and in alleviating obesity-linked conditions.

From The Wall Street Journal • Jun. 8, 2026

"As our understanding of these compounds grows, there is a real opportunity to make dietary guidance more specific and more effective."

From BBC • Jun. 8, 2026

A new study has provided the first comprehensive estimate of koala numbers in the region and identified a humane, cost effective strategy to keep the population at sustainable levels.

From Science Daily • Jun. 8, 2026

These were all effective tactics and without question advanced the cause of the suffragists in their campaign to win the ballot.

From "1919 The Year That Changed America" by Martin W. Sandler




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