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.
adv 1: in a powerful manner; "the federal government replaced the
powerfully pro-settler Sir Godfrey Huggins with the
even tougher and more determined ex-trade unionist"
2: in a manner having a powerful influence; "Clytemnestra's
ghost crying in the night for vengeance remained most
potently in the audience's mind" [syn: potently]