Dictionary and Thesaurus

Definition of Powerful

• (a.) Full of power; capable of producing great effects of any kind; potent; mighty; efficacious; intense; as, a powerful man or beast; a powerful engine; a powerful argument; a powerful light; a powerful vessel.
• (a.) Large; capacious; -- said of veins of ore.

Synonyms of Powerful

• Strong
• Potent
• Puissant
• Masterful
• Mighty
• [See STRONG].

Antonyms of Powerful

Homophones of Powerful