Emily Dickinson Lexicon

POW'ER-FUL, a.

1. Having great physical or mechanical power; strong; forcible; mighty; as, a powerful army or navy; a powerful engine.
2. Having great moral power; forcible to persuade or convince the mind; as, a powerful reason or argument.
3. Possessing great political and military power; strong in extent of dominion or national resources; potent; as, a powerful monarch or prince; a powerful nation.
4. Efficacious; possessing or exerting great force or producing great effects; as, a powerful medicine.
5. In general, able to produce great effects; exerting great force or energy; as, powerful eloquence. The word of God is quick and powerful. – Heb. iv.
6. Strong; intense; as, a powerful heat or light.