LITURGY
liturgy
(noun) a rite or body of rites prescribed for public worship
Source: WordNet® 3.1
Etymology
Noun
liturgy (countable and uncountable, plural liturgies)
A predetermined or prescribed set of rituals that are performed, usually by a religion.
An official worship service of the Christian church.
(historical) In Ancient Greece, a form of personal service to the state.
Source: Wiktionary
Lit"ur*gy, n.; pl. Liturgies. Etym: [F. liturgie, LL. liturgia, Gr.
Lay, a., and Work.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition