THE LITURGY OF THE FAITHFUL
The second part of the Divine Liturgy begins here. It is called The Liturgy of the Faithful, for, in the Church of the first centuries, only the baptized could remain in the Nave from this point on.
THE LITURGY OF THE CATECHUMENS
Liturgy of the Catechumens, the instructional part of the Christian worship service, consisting of hymns, prayers, scriptural readings, and homilies, which precedes the Eucharist (the Liturgy of the Faithful). In the early church the catechumens, or hearers who had not yet been baptized, were dismissed at the conclusion of the Liturgy of the Catechumens, and the faithful, or baptized Christians, remained to celebrate the mystery of the Eucharist, also called Holy Communion.
The Divine Liturgy of St. John Chrysostom : the office of preparation
The word “liturgy” is a contraction of two Greek words, the word laikos meaning “common,” as in “belonging to the people,” and the word ergon, meaning “work.” Thus “liturgy” refers to the work of the common people in praising God.