Answer:
a form or formulary according to which public religious worship, especially Christian worship, is conducted.
Explanation:
Liturgy is the customary public worship performed by a religious group, especially by a Christian group. As a religious phenomenon, liturgy represents a communal response to and participation in the sacred through activities reflecting praise, thanksgiving, remembrance, supplication or repentance. It forms a basis for establishing a relationship with a divine agency, as well as with other participants in the liturgy.