The phrase "Nunc Dimittis" comes from the Latin translation of the beginning words in the hymn of Simeon, meaning "now let depart." It's often used in Christian liturgy and refers to the biblical story where the prophet Simeon recognizes Jesus as the Savior and praises God for allowing him to see the salvation before he dies. There are several synonyms for the phrase "Nunc Dimittis," including "Canticle of Simeon," "Song of Simeon," "Canticle of Redemption," and "Nunc Dimittis Canticle." These synonyms are commonly used in different denominational liturgy and signify the same purpose, expressing gratitude and surrender to God's plan of redemption and salvation.