(lit., "source of influence"): a spiritual mentor serving in a yeshivah* or a chassidic community

(lit., "source of influence"): one who plays an active role in the spiritual development of a person or his environment Men of the Great Assembly The body of 120 Sages convened by Ezra at the beginning of the Second Temple Era which canonized the Bible, structured the prayer service, and presided over the renewal of Jewish practice in Eretz Yisrael after the return from the Babylonian exile

(lit., "source of influence"): In Chassidic circles, a spiritual mentor.