Hoshana Rabbah
noun
Hoshana Rab·bah
variants or Hoshanah Rabbah or Hoshana Rabba
-ˈrä(ˌ)bä,
-bə
: the 7th day of the Festival of Sukkoth observed on the 21st day of Tishri with special prayers and ceremonies in the synagogue by Orthodox and Conservative Jews
Word History
Etymology
Aramaic hōshaʽnā rabbā