noun Sanc·tus \ˈsaŋ(k)-təs; ˈsäŋ(k)-təs, -ˌtüs\

Definition of Sanctus

  1. :  an ancient Christian hymn of adoration sung or said immediately before the prayer of consecration in traditional liturgies

Origin and Etymology of sanctus

Middle English, from Late Latin Sanctus, sanctus, sanctus Holy, holy, holy, opening of a hymn sung by the angels in Isa 6:3

First Known Use: 15th century

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