WordNet (r) 3.0 (2006):Rosh Hashana n 1: (Judaism) a solemn Jewish feast day celebrated on the 1st or 1st and 2nd of Tishri; noted for the blowing of the shofar [syn: Rosh Hashanah, Rosh Hashana, Rosh Hashonah, Rosh Hashona, Jewish New Year]