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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.

Water may not be effective in fighting a fire caused by an MMA explosion, according to the National Oceanic and Atmospheric Administration.

From The Wall Street Journal • May 24, 2026

But he also said polling hasn’t shown that message to be an effective one, and he’s confident that voters will show their ongoing trust in the party at the polls.

From Los Angeles Times • May 24, 2026

The recognition remained effective regardless of viewing angle or how the participants walked.

From Science Daily • May 23, 2026

Republicans currently control both chambers of Congress, with a 53-47 effective majority in the Senate and a narrow edge in the House.

From MarketWatch • May 23, 2026

In the absence of effective treatment, his recovery was achingly slow—and soon followed by another depression.

From "The Woman All Spies Fear" by Amy Butler Greenfield




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