רְבַב, ch.same, to be great, esp. to be a teacher, be in office. Y. M. Kat. III, 83ᵇ top כגון אנן דרַבְבִינָן משגחין וכ׳ such as we, who are teachers: people look up to us to answer their questions; ib. ואנן אפי׳ רבבינן וכ׳ and we, although we are teachers, we know not &c.