noun.
A psalm, hymn, or prayer sung responsively or by alternation of two choirs, as in the English cathedral service.
noun.
In the liturgy or mass of both the Eastern and Western churches, as well as in the day-hours and other offices, a series of verses from the Psalms or other parts of Scripture, either in their original sequence or combined from various passages, sung as a prelude or conclusion to some part of the service.
noun.
A scriptural passage or original composition sung as an independent part of the service, and set to more elaborate music; an anthem.
noun.
An echo or a response.