Read the dictionary definition of mighty. All definitions for this word.
1. having or showing great strength or force or intensity
1. struck a mighty blow
2. the mighty logger Paul Bunyan
3. the pen is mightier than the sword
2. (Southern regional intensive) very; to a great degree
1. the baby is mighty cute
2. he's mighty tired
3. it is powerful humid
4. that boy is powerful big now
5. they have a right nice place
6. they rejoiced mightily