Meaning of powerful

pow•er•ful

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.