A modern dictionary of Catholic terms, both common and obscure. Find accurate definitions of words and phrases.
The antiphons to Vespers on the seven days before Christmas Eve, each beginning with the invocation "O," hence also called the "Great O's" as follows: O Wisdom, O Sacred Lord, O Flower of Jesse's stem, O Key of David, O Radiant Dawn, O King of all the nations, O Emmanuel.
All items in this dictionary are from Fr. John Hardon's Modern Catholic Dictionary, © Eternal Life. Used with permission.