Divine Liturgy is a principal Eastern Christian name for the Eucharistic service. More broadly, divine liturgy is the public worship in which the Church gathers to hear the Word of God, offer thanksgiving, and receive Holy Communion.
Structure
The service ordinarily includes preparation, litanies and hymns, readings from Scripture, the proclamation of the Gospel, the Eucharistic prayer, consecration, intercession, Communion, and dismissal.
Roman-Ruthenian usage
The United Roman-Ruthenian Church preserves Eastern and Western liturgical inheritances through its approved rites, including the Gallo-Russo-Byzantine, Anglican-Byzantine, Gallican, and Anglo-Roman traditions. Thus the most commonly-used name is Divine Liturgy. Holy Mass is used more commonly with the church's latin/western rites, but the two terms are considered interchangeable in both traditions.