Holy Qurbana in the context of "Homilies"

Mass is the main Eucharistic liturgical service in many forms of Western Christianity. The term Mass is commonly used in the Catholic Church, Western Rite Orthodoxy, Old Catholicism, and Independent Catholicism. The term is also used in many Lutheran churches, as well as in some Anglican churches, and on rare occasion by other Protestant churches.

Other Christian denominations may employ terms such as Divine Service or worship service (and often just "service"), rather than the word Mass. For the celebration of the Eucharist in Eastern Christianity, including Eastern Catholic Churches, other terms such as Divine Liturgy, Holy Qurbana, Holy Qurobo and Badarak (or Patarag) are typically used instead.

The Mass is the central liturgical service of the Eucharist in the Catholic Church, in which bread and wine are consecrated and become the body and blood of Christ. As defined by the Church at the Council of Trent, in the Mass "the same Christ who offered himself once in a bloody manner on the altar of the cross, is present and offered in an unbloody manner". The Church describes the Mass as the "source and summit of the Christian life", and teaches that the Mass is a sacrifice, in which the sacramental bread and wine, through consecration by an ordained priest, become the sacrificial body, blood, soul, and divinity of Christ as the sacrifice on Calvary made truly present once again on the altar. The Catholic Church permits only baptised members in the state of grace (Catholics who are not in a state of mortal sin) to receive Christ in the Eucharist.

Many of the other sacraments of the Catholic Church, such as confirmation, holy orders, and holy matrimony, are generally administered within a celebration of Mass, but before the Second Vatican Council were often or even usually administered separately. The term Mass, also Holy Mass, is commonly used to describe the celebration of the Eucharist in the Latin Church, while the various Eastern Catholic liturgies use terms such as Divine Liturgy, Holy Qurbana, and Badarak, in accordance with each one's tradition.

The Liturgy of Addai and Mari (or the Holy Qurbana of Mar Addai and Mar Mari) is the Eucharistic liturgy belonging to the East Syriac Rite and was historically used in the Church of the East of the Sasanian (Persian) Empire. This liturgy is traditionally attributed to Saint Addai (disciple of Saint Thomas the Apostle) and Saint Mari (a disciple of Saint Addai). It is currently in regular use in the Assyrian Church of the East (including its archdiocese the Chaldean Syrian Church of India), the Ancient Church of the East, the Syro-Malabar Catholic Church of India, and the Chaldean Catholic Church. The latter two are Eastern Catholic churches in full communion with the Holy See of Rome.