[from mighty.] With great power, force of strength; vigorously; as, to strive mightily.

1. Vehemently; with great earnestness.

Cry mightily to God. Jonah 3:8.

2. Powerfully; with great energy.

Whereto I also labor, striving according to his working, which worketh in me mightily. Colossians 1:29.

3. With great strength of argument.

He mightily convinced the Jews. Acts 18:28.

4. With great or irresistible force; greatly; extensively.

So mightily grew the word of God and prevailed. Acts 19:20.

5. With strong means of defense.

Fortify the power mightily. Nahum 2:1.

6. Greatly; to a great degree; very much.

I was mightily pleased with a story applicable to this piece of philosophy.

[Admissible in colloquial and familiar language.]