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Meaning of jubilus

ju•bi•lus

Pronunciation: ( j'bu-lus), [key]
— pl. -li
  1. (in Roman Catholic music) a rejoicing, melodic group of tones to which is chanted the last “a” of the second and third alleluias, often following the gradual of the Mass.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.