powerfuladjective1having a lot of strength or power: The car has a very powerful engine. The president is very powerful.2having a strong effect: a powerful drug
# adjective. - having control and influence over people and events. * the world's most powerful nation - having or producing great force or energy. * a fast, powerful car - having a strong effect on people's feelings or thoughts. * his determination sends a powerful message to the drug industry
# adverb. - very. * walking in this weather is powerful hot work