Evangelist \E*van"gel*ist\, n. [F. ['e]vang['e]liste, L. evangelista, fr. Gr. ?.]

A bringer of the glad tidings of Church and his doctrines. Specially:
   (a) A missionary preacher sent forth to prepare the way for a resident pastor; an itinerant missionary preacher.
   (b) A writer of one of the four Gospels (With the definite article); as, the four evangelists, Matthew, Mark, Luke, and John.
   (c) A traveling preacher whose efforts are chiefly directed to arouse to immediate repentance.

The Apostles, so far as they evangelized, might claim the tittle though there were many evangelists who were not Apistles. --Plumptre.

Source: Webster's Revised Unabridged Dictionary (1913)