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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.

The company also received a violation for allegedly failing to “implement and effective written injury and illness prevention program” in accordance with state law.

From Los Angeles Times • May 23, 2026

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

From Science Daily • May 23, 2026

The Met has argued it needs new technology to remain effective amid staffing cutbacks.

From BBC • May 22, 2026

The WHO is prioritising certain existing treatments to see how effective they might be in combating the strain.

From Barron's • May 22, 2026

For an effective critique, see Laudan, ‘The Pseudoscience of Science?’

From "The Invention of Science" by David Wootton




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