Liturgical / Worshiping Text [Catholic]
"A public service, duty, or work. In Scripture it refers to the religious duties to be performed by priests and levites in the Temple, especially those related to the Sacrifice; in Christian use among the Eastern Churches it means the Eucharistic Sacrifice.
In present day usage liturgy is the official public worship of the Church and is thus distinguished from private devotion. It is the special title of the Eucharist, and the administration of the sacraments with the annexed use of the sacramentals."