Pronunciation: ( Seph. täsh-lēkh'; Ashk. täsh'likh),[key] —n.Hebrew. a Jewish rite, performed on the afternoon usually of the first day of Rosh Hashanah, in which the participants symbolically cast off their sins by gathering along the banks of a river, stream, or the like and reciting prayers of repentance. Also,Tash'lik,Tash'lich.