In Latin the vocative domne (lowercase "d" and lack of "i"), "lord", is one way to address a priest; Domine (capital "D" and with an "i"), "O Lord", is reserved for God alone.

• Joseph A. Jungmann, The Mass of the Roman Rite: Its Origins and Development (Missarum Sollemnia), trans. Francis Brunner, vol. 1 (New York: Benziger Brothers, 1951), 454 & 455n94:

The domnus here [in asking a priest "Iube, domne, benedicere.", "Deign, lord, to give a blessing."] used is also customary in other cases to distinguish earthly masters from the heavenly Dominus.

In Latin the vocative domne (lowercase "d" and lack of "i"), "O lord", is one way to address a priest; Domine (capital "D" and with an "i"), "O Lord", is reserved for God alone.

• Joseph A. Jungmann, The Mass of the Roman Rite: Its Origins and Development (Missarum Sollemnia), trans. Francis Brunner, vol. 1 (New York: Benziger Brothers, 1951), 454 & 455n94:

The domnus here [in asking a priest "Iube, domne, benedicere.", "Deign, lord, to give a blessing."] used is also customary in other cases to distinguish earthly masters from the heavenly Dominus.