powerful powerful /ˈpaʊɝfəl/

adjective

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

adverb

1. (Southern regional intensive) very; to a great degree  ( mightily , powerful , right , mighty )
   (Southern regional intensive) very; to a great degree
    The baby is mighty cute
   the baby is mighty cute
    He's mighty tired
   he's mighty tired
    It is powerful humid
   it is powerful humid
    That boy is powerful big now
   that boy is powerful big now
    They have a right nice place
   they have a right nice place
    They rejoiced mightily
   they rejoiced mightily