An established formula for public worship, or the entire ritual for public worship in a church which uses prescribed forms; a formulary for public prayer or devotion. In the Roman Catholic Church it includes all forms and services in any language, in any part of the world, for the celebration of Mass.
The structure of the worship service. The word means ?work of the people.
a word derived from the Greek word for "public service" or "common service." In a general sense, this term refers to any public Christian worship service. In the Orthodox Church it most frequently is used, in capitalized form, in reference to the Eucharist.