Ite, missa est are the concluding words addressed to the people in the
Mass of the
Roman Rite. The words are
Latin for "Go, it is the dismissal." The term "Mass" (in Latin, missa) derives from this phrase. Until the reforms of 1960, at Masses without the Gloria,
Benedicamus Domino was said instead.The response of the people (or, in the
Tridentine Mass, of the servers at
Low Mass, the choir at
Solemn Mass) is "Deo gratias" (Thanks be to God).The
Catholic Encyclopedia states , the word missa here is not the participle feminine of mittere, meaning "sent"; it is a noun, "a substantive of a late form for missio. There are many parallels in medieval Latin, collecta, ingressa, confessa, accessa, ascensa - all for forms in -io."
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