Alleluia

An exclamation of praise to God; Alleluia refers to an elaborate chant sung as the fifth sung item of a Proper Mass. It is sometimes replaced by a Tract on special occasions. a highly melismatic responsorial chant from the mass. Alleluias are commonly identified by the first few words of their verses, such as Alleluia Justus ut palma. The form of the alleluia is complicated: