Maggid (Hebrew: מַגִּיד), sometimes spelled as magid, is a term used to describe two distinct concepts, the more common one defining a concrete person, and the other defining a celestial entity.
The usual meaning is that of a traditional Eastern European Jewish religious itinerant preacher, skilled as a narrator of Torah and religious stories. A preacher of the more scholarly sort was called a "darshan", and usually occupied the official position of rabbi. The title of "maggid mesharim" (= "a preacher of uprightness"; abbreviated מ"מ) probably dates from the sixteenth century.
The other meaning appears in the context of Jewish mysticism and describes a celestial entity, most commonly an angel, who manifests itself as a voice delivering mystical secrets to a kabbalist, or sometimes speaking through the mouths of the chosen ones.
There always have been two distinct classes of leaders in Israel—the scholar and rabbi, and the preacher or maggid. That the popular prophet was sometimes called "maggid" is maintained by those who translate מַגִּיד מִשְׁנֶה (maggid mishne) Zechariah 9:12, by "the maggid repeats" (Löwy, "Beqoret ha-Talmud," p. 50). Like the Greek sophists, the early maggidim based their preaching on questions addressed to them by the multitude. Thus the Pesiqta, the first collection of set speeches, usually begins with "yelammedenu rabbenu" (= "let our master teach us"). An excellent example is the Passover Haggadah, which is introduced by four questions; the reciter of the answer is called "maggid." When there were no questions the maggid chose a Biblical text, which was called the "petichah" (opening).