Walpurgis Night: Meaning and Definition of

Walpur'gis Night'

Pronunciation: (väl-poor'gis-näkht"). [key]
  1. (esp. in medieval German folklore) the evening preceding the feast day of St. Walpurgis, when witches congregated, esp. on the Brocken. German,
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.