Definitions

powerful

[pou-er-fuhl] / ˈpaʊ ər fəl /

ADJECTIVE

strong, effective

Synonyms

STRONGEST

all-powerful authoritative capable compelling dominant dynamic energetic forceful impressive influential mighty persuasive potent robust vigorous

WEAK

able almighty authoritarian big-wheel cogent commanding competent controlling convincing effectual efficacious forcible in control in the saddle omnipotent overruling paramount preeminent prevailing puissant ruling sovereign stalwart strapping strengthy sturdy supreme telling upper hand weighty wicked wieldy

Antonyms

STRONGEST

idle impotent inactive incapable ineffective ineffectual insignificant lethargic unimportant weak

WEAK

unable

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.

American AI developer Anthropic said Tuesday it was investigating unauthorized access to Mythos, its powerful model which the company itself worries could be a boon for hackers.

From Barron's • Apr. 22, 2026

Legal fights have also cropped up in Nevada and New Jersey, two states with powerful casino interests.

From The Wall Street Journal • Apr. 21, 2026

More concerning to critics is a decision by the Space Force in December to invite rocket companies to build and operate a “super heavy” launchpad on the base with an even more powerful rocket.

From Los Angeles Times • Apr. 21, 2026

In As2S3, the effect is especially powerful at very small scales.

From Science Daily • Apr. 21, 2026

I decided to win her over with my charm, so I smiled up at her with a powerful grin that showed all my teeth.

From "The Detective's Assistant" by Kate Hannigan

Vocabulary lists containing powerful

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