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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.

It would be negligent to write about Arsenal beating a direct opponent without mentioning their most effective tool this season.

From BBC • May 30, 2026

Because the condition involves many overlapping biological changes, including inflammation, protein buildup, and neuron damage, researchers believe a multitarget strategy may prove more effective than focusing on a single pathway alone.

From Science Daily • May 29, 2026

New Jersey has become an unlikely show-business bright spot for one simple reason: It has the most effective tax incentive program of any state right now.

From The Wall Street Journal • May 28, 2026

Verra Mobility’s contract with Avis Budget Group, representing 13.5% of its revenue, was abruptly canceled, effective September.

From Barron's • May 28, 2026

This method was particularly effective in the case of the dragon of Lambton Hall.

From "Jeremy Thatcher, Dragon Hatcher" by Bruce Coville




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