And there appeared distinct tongues, as of fire — That is, small flames of fire. This is all which the phrase, tongues of fire, means in the language of the seventy. Yet it might intimate God's touching their tongues as it were (together with their hearts) with Divine fire: his giving them such words as were active and penetrating, even as flaming fire.
Related Commentaries of Acts 2:3
Acts 2:3
3 And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.