Rosh Ha·sha·nah also Rosh Ha·sha·na or Rosh Ha·sho·na or Rosh Ha·sho·nah (rôsh' hə-shô'nə, -shä'-, hä-, hä-shä-nä') n. The Jewish New Year, observed on the first day or the first and second days of Tishri and marked by solemnity as well as festivity.
[Hebrew rō'š haš-šānâ : rō'š, head, beginning; see rš in Semitic roots + ha-, the + šānâ, year; see šn in Semitic roots.]