Tikkun Leil Shavuot
Definition from Wiktionary, the free dictionary
From Hebrew; literally, "rectification for Shavuot Night".
- (Judaism) A special service for the evening of Shavuot, involving the study of Jewish sources, particularly the Jewish bible and postbiblical law materials all night on the holiday of Shavuot.
a special service for the evening of Shavuot