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.
The powerful grace that lies
In herbs, plants, stones, and their true qualities. --Shak.
2. Mining Large; capacious; -- said of veins of ore.
Syn: -- Mighty; strong; potent; forcible; efficacious; energetic; intense.
-- Pow*er*ful*ly, adv. -- Pow*er*ful*ness, n.
n : possession of controlling influence; "the deterrent power of
nuclear weapons"; "the power of his love saved her"; "his
powerfulness was concealed by a gentle facade" [syn: power]
[ant: powerlessness, powerlessness]