<p><strong>Noun</strong></p><ul><li>Plural: rabbis.</li><li>The chief religious official of a synagogue, trained usually in a theological seminary and duly ordained, who delivers the sermon at a religious service and performs ritualistic, pastoral, educational, and other functions in and related to the role of a spiritual leader of Judaism and the Jewish community. Compare: cantor (def 2).</li><li>A title of respect for a Jewish scholar or teacher.</li><li>A Jewish scholar qualified to rule on questions of Jewish law.</li><li>Any of the Jewish scholars of the 1st to 6th centuries A.D. who contributed to the writing, editing, or compiling of the Talmud.</li><li>Slang. A personal patron or adviser, as in business.</li></ul>