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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.

See Examples For:

AD109 has received Fast Track designation from the FDA for the treatment of OSA, reflecting the need for effective and well-tolerated drug therapies for the condition.

From Science Daily Sep. 1, 2026

Advocates have pointed to mounting research in other cities that showed road improvements along high-injury street corridors were more effective than police at changing driver behaviors.

From Los Angeles Times Sep. 1, 2026

They have evolved effective tactics, working out where Russian air defenses will be and how to get past them, he said.

From The Wall Street Journal Sep. 1, 2026

The U.S. will reportedly get 55 percent of the deal’s effective output, including an ownership stake and rights to buy oil at cost—meaning priced according to the cost of producing it plus a set markup.

From Slate Aug. 31, 2026

The strategy that Jefferson and Madison adopted was elegantly effective and thoroughly imperialistic.

From "Founding Brothers: The Revolutionary Generation" by Joseph J. Ellis




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