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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.

Executive Producer Nick Bilton sent a note to Pelley on Tuesday night saying he was being terminated for cause, effective immediately, according to a copy of the letter reviewed by The Wall Street Journal.

From The Wall Street Journal • Jun. 3, 2026

“There’s no effective way for them to compete with a terrestrial network,” he said.

From MarketWatch • Jun. 3, 2026

The government says the trial will help build a more effective screening system for the disease for the future.

From BBC • Jun. 2, 2026

CAR T cells lacking the protein were more effective at controlling tumors and helped extend survival.

From Science Daily • Jun. 2, 2026

I wash my hands one more time—I’d used a tissue to move the mouthguard, but who knows if that’s at all effective.

From "Popcorn" by Rob Harrell




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