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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.

“Other than communications and rate hikes, I don’t see effective tightening options at this time,” says Darrell Duffie, professor of management and Finance at the Graduate School of Business, at Stanford University.

From Barron's • Jun. 29, 2026

This spring, Ipsos found that 84% of them consider air conditioning effective against the heat, but only 22% own a unit, even though most can afford it.

From The Wall Street Journal • Jun. 29, 2026

Although lifestyle factors were not directly examined in this study, the researchers emphasize that maintaining overall health remains one of the most effective ways to support brain function and reduce Alzheimer's risk.

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

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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