Adam Clarke on Acts 11:27

Came prophets from Jerusalem - Though the term prophet is used in the New Testament simply to signify a teacher, (see the note on Gen 20:7, where the subject is largely explained), yet here it evidently means also such as are under Divine inspiration, and foretold future events. This was certainly the case with Agabus, Act 11:28, though, perhaps, his ordinary character was that of a teacher or preacher. It seems from various scriptures, Rom 12:4, etc., 1 Corinthians 13:2-14:40, that the prophets of the New Testament were

1. Teachers or preachers in general.

2. Persons who, on special occasions, were under the influence of the Divine Spirit, and then foretold certain future events.

3. Persons who recited hymns to the honor of God in the public assemblies of the Christians.

4. Persons who prayed in those assemblies, having sometimes the gift of tongues, at other times not.

From Eph 2:20; Eph 3:5, we learn that the prophets of the Christian Church were inferior to the apostles; but, from Eph 4:11, we see that they were superior to all other teachers, even to evangelists and pastors.