The story
From Hebrew; literally, "rectification for Shavuot Night".
Etymology from Wiktionary, CC BY-SA 4.0.
Tikkun Leil Shavuot
Today it means: 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. Full definition →