In liturgical use the term preface is a formal thanksgiving that immediately precedes (or forms part of) the Canon, Eucharistic Prayer, Prayer of Consecration or analogous portion of the Eucharist (Holy Communion, Mass or Divine Liturgy). The preface, which begins at the words, "It is very meet and just, right and salutary" (or a variation thereof) is ushered in, in all liturgies, with the Sursum corda ("Lift up your hearts") and ends with the Sanctus ("Holy, Holy, Holy"). In most Western liturgies, proper prefaces are appointed for particular occasions. In the various Eastern liturgies there is great variation. Among those who follow the Rite of Constantinople the audible portion of the preface does not change, but the silent prayer said by the priest will differ depending upon whether it is the Liturgy of St. John Chrysostom or the Liturgy of St. Basil the Great. Among the Oriental Orthodox Churches the preface will take different forms, depending upon the liturgical rite or the particular feast day.

Anglican forms

In the 1662 Book of Common Prayer, the preface omits the Dominus vobiscum ("The Lord be with you") and is in the form: Then the Sanctus is said or sung. In more modern orders of service, it is common for the Dominus vobiscum to introduce the Sursum corda.

Byzantine form

In the Byzantine Rite, the preface opens with the following:

Lutheran forms

In Lutheran liturgies, the preface has many different translations that can be used in the Divine Service. The following is a common form:

Roman Catholic form

In the Roman Rite, the preface opens with the following: The current English translation has: There are a wide variety of proper prefaces for every mass, depending on the missal used. As an example, a preface appointed for masses in the first Sunday in Advent is: In English: