Seph. Heb. /haw shah nah" rddah bah"/ ; Ashk. Heb. /hoh shah"naw rddah"baw/
the seventh day of the Jewish festival of Sukkoth, occurring on the twenty-first day of Tishri and having a special liturgy containing a series of invocations to God for forgiveness and salvation.
Also, Hoshanah Rabbah .
[ hosh ( i ) 'ah nna save, we pray + rabba the myriad, multitude ]