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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:

The company announced Thursday she is no longer employed at Fox News and Fox Business Network, effective immediately.

From Los Angeles Times Sep. 3, 2026

"It doesn't fully explain why bats are such effective viral reservoirs, but it reveals a level of immune variety we didn't know existed and gives us an entirely new direction to explore."

From Science Daily Sep. 3, 2026

IHH could explore alternative routes to raise its effective Fortis stake, including a potential share swap involving Gleneagles India, he says.

From The Wall Street Journal Sep. 2, 2026

"The president had developed with prime minister Starmer a very friendly and highly effective relationship, particularly on Ukraine and the Middle East," a French presidential official said, asking not to be named.

From Barron's Sep. 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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