n. The act of announcing; proclamation; promulgation: as, the annunciation of a peace; “the annunciation of the gospel,”n. Specifically The announcement to Mary, by the angel Gabriel, of the incarnation of Christ.n. [capitalized] Eccles., the festival instituted by the church in memory of the announcement to Mary that she should bring forth a son who should be the Messiah. It is solemnized on the 25th of March.n. An order of nuns founded about 1500 at Bourges, France, by Queen Jeanne of Valois, after her divorce from Louis XII.n. An order of nuns founded about 1604 at Genoa, Italy, by Maria Vittoria Fornari.