liturgy

A prescribed form or set of forms for public religious worship.

The sacrament of the Eucharist.

In ancient Greece, particularly at Athens, a form of personal service to the state which citizens possessing property to a certain amount were bound, when called upon, to perform at their own cost.

A form or method of conducting public worship; an appointed form for the words and acts used in the rites and ceremonies of the Christian church.

Specifically, in liturgiology, and as the name most frequently used in the Greek Church, the form of service used in the celebration of the eucharist, or that service itself.

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.

A predetermined or prescribed set of rituals that are performed, usually by a religion.

An official worship service of the Christian church.

a Christian sacrament commemorating the Last Supper by consecrating bread and wine

a rite or body of rites prescribed for public worship