any of the many itinerant Jewish preachers who flourished especially in Poland and Russia during the 17th and 18th centuries. Because rabbis at that time preached only on the Sabbaths preceding Pesah (Passover) and Yom Kippur (Day of Atonement), maggidim were in great demand throughout the year to instruct, encourage, and sometimes admonish their congregation. Through their preaching, the maggidim were instrumental in spreading the 18th-century pietistic movement called Hasidism. Rabbi Dov Baer of Mezhirich, who succeeded Ba'al Shem Tov as leader of the Hasidic movement in the 18th century, is known as the Great Maggid.
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