礼拜仪式，或称为礼仪（liturgy），是指任何宗教团体的一系列公开仪式形式或礼拜模式，偶尔特指被基督教会（Christian congregation）或基督教教派（Christian denomination）常规使用（不管是被推荐还是被规定）的仪式。

1.礼仪（Liturgy）这个字的根源是源自希腊文「人民、百姓」和「工作、事务」两个字，将此二字组合起来的立即意义就是：「为百姓的公共事务」或「国之民生计划」。中文翻译为：「礼仪」，也取《礼记》：「礼者履也。」，将履作act行动之意，但非完美之翻译。

Liturgy (Greek:λειτουργία) is the customary public worship performed by a specific religious group, according to its particular beliefs, customs and traditions. The word, sometimes rendered by its English translation "service", may refer to an elaborate formal ritual such as the Eastern Orthodox Divine Liturgy (Greek:Θεία Λειτουργία), Catholic Mass, the Eucharist or Mass (Anglican Communion), or a daily activity such as the Muslim salah and Jewish services. As a religious phenomenon, liturgy is a communal response to the sacred through activity reflecting praise, thanksgiving, supplication, or repentance. Ritualization may be associated with life events such as birth, coming of age, marriage and death. It thus forms the basis for establishing a relationship with a divine agency, as well as with other participants in the liturgy. Methods of dress, preparation of food, application of cosmetics or other hygienic practices are all considered liturgical activities.