mightily Meaning, Definition & Usage

  1. adverb powerfully or vigorously
    • he strove mightily to achieve a better position in life
  2. adverb (Southern regional intensive) very; to a great degree
    powerful; right; mighty.
    • the baby is mighty cute
    • he's mighty tired
    • it is powerful humid
    • that boy is powerful big now
    • they have a right nice place
    • they rejoiced mightily

WordNet

Might"i*ly adverb
Etymology
From Mighty.
Definitions
  1. In a mighty manner; with might; with great earnestness; vigorously; powerfully.
    Whereunto I also labor, striving according to his working, which worketh in me mightily. Col. i. 29.
  2. To a great degree; very much.
    Practical jokes amused us mightily. Hawthorne.

Webster 1913