Powerful Pow"er*ful, a. 1. 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. [1913 Webster]

The powerful grace that lies In herbs, plants, stones, and their true qualities. --Shak. [1913 Webster]

2. (Mining) Large; capacious; -- said of veins of ore. [1913 Webster]

Syn: Mighty; strong; potent; forcible; efficacious; energetic; intense. [1913 Webster] -- {Pow"er*ful*ly}, adv. -- {Pow"er*ful*ness}, n. [1913 Webster]

The Collaborative International Dictionary of English. 2000.