witches Sabbath

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witch′es' Sab′bath

(or sab′bath),

(in European folklore) a secret rendezvous of witches and sorcerers, characterized by orgiastic rites, dances, feasting, etc.
References in periodicals archive ?
It was certainly deserved here with players seizing the opportunity to shine, none more so than Paul Philbert and Kiyomi Seed, a young dynamic duo on timpani who powered along the Witches Sabbath finale.
Berlioz: A Witches Sabbath from Symphonie Fantastique; Shostakovitch: Chamber Symphony from String Quartet No.
Mussorgsky's Night on a Bare Mountain was originally a brutal vision of Gogol's story of a mountain-top witches Sabbath.