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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:

These two contributions have different effective masses and can interfere with each other.

From Science Daily Sep. 5, 2026

“It’s extremely important to me to have these programs be as effective as possible,” she said.

From Los Angeles Times Sep. 4, 2026

The Ten Towns new tariff will be effective from 1 October and equates to an extra £7 per month on the average bill for customers.

From BBC Sep. 4, 2026

On Thursday, Fox announced that Bartiromo was “no longer with” the network, effective immediately.

From Slate Sep. 4, 2026

Ne-kah-e-se-y would coolly draw his bow and arrow, which the Osage considered more effective than a bullet.

From "Killers of the Flower Moon" by David Grann




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