What is Liturgy?
Liturgy is divine worship, the proclamation of the Gospel, and active charity. The word “liturgy” originally meant a “public work” or a “service on behalf of the people”. In Christian tradition it means the participation of the People of God in “the work of God”. In the liturgy Christ, our redeemer and high priest, continues the work of our redemption in, with, and through his Church.
The liturgy is seen as an exercise of the priestly office of Jesus Christ. In it full public worship is performed by the Mystical Body of Jesus Christ. Every liturgical celebration, because it it an action of Christ the priest and of his Body the Church, is a sacred action surpassing all others. Catechism of the Catholic Church: 1069-1076