WordWeb Online

1. Having great power, force, potency or effect
   "the most powerful government in western Europe"; "his powerful arms"; "a powerful bomb"; "the horse's powerful kick"; "powerful drugs"; "a powerful argument"
    
2. Strong enough to knock down or overwhelm
   "a powerful blow";
   - knock-down
    
3. Having great influence
   - potent
    
4. (of a person) possessing physical strength and weight; rugged and powerful
   "powerful arms";
   - brawny, hefty, muscular, sinewy, muscly
    
5. Displaying superhuman strength or power
   "powerful exertions";
   - herculean

1. (Southern regional intensive) very; to a great degree
   "it is powerful humid"; "that boy is powerful big now";
   - mighty, mightily, right

See also: all-powerful, almighty, coercive, compelling, effective, effectual, efficacious, influential, mighty, muscular, omnipotent, potent, power, powerfulness, puissant [archaic], regent, regnant, reigning, ruling, stiff, strong, superhuman

Antonym: powerless

Encyclopedia: Powerful