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Meaning of powerful

pow•er•ful

Pronunciation: (pou'ur-ful), [key]
— adj.
  1. having or exerting great power or force.
  2. physically strong, as a person: a large, powerful athlete.
  3. producing great physical effects, as a machine or a blow.
  4. potent; efficacious: a powerful drug.
  5. having great effectiveness, as a speech, speaker, description, reason, etc.
  6. having great power, authority, or influence; mighty: a powerful nation.
  7. great in number or amount: a powerful lot of money.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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