Thesaurus.com
Dictionary.com
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 jab is not effective at preventing the transmission of bacteria between people.

From BBC • Jun. 12, 2026

One of the most effective ways to prevent future financial mistakes is to set rules of thumb, she noted.

From MarketWatch • Jun. 12, 2026

Monetary policy is also becoming less effective in shaping longer-term interest rates.

From Barron's • Jun. 12, 2026

Additional testing showed the regenerated tissue was hyaline cartilage, the type needed for healthy joint function, rather than the less effective fibrocartilage.

From Science Daily • Jun. 12, 2026

This method was particularly effective in the case of the dragon of Lambton Hall.

From "Jeremy Thatcher, Dragon Hatcher" by Bruce Coville




Vocabulary lists containing effective


Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "effective" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com