WordNet (r) 3.0 (2006):

Simhat Torah
    n 1: (Judaism) a Jewish holy day celebrated on the 22nd or 23rd
         of Tishri to celebrate the completion of the annual cycle
         of readings of the Torah [syn: Shimchath Torah, Simchat
         Torah, Simhath Torah, Simhat Torah, Simchas Torah,
         Rejoicing over the Law, Rejoicing of the Law,
         Rejoicing in the Law]