Requiem
From BiblePortal Wikipedia
Webster's Dictionary [1]
(1): ( n.) Any grand musical composition, performed in honor of a deceased person.
(2): ( n.) A mass said or sung for the repose of a departed soul.
(3): ( n.) Rest; quiet; peace.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [2]
a musical mass for the dead in the Church of Rome. so called from the words of the Introit, "Requiem aeternam dona eis, Domine," Give them eternal rest, O Lord, etc. ( 2 Esdras 2:34-35); and the antiphon for the psalms in place of the Gloria Patri
The Nuttall Encyclopedia [3]
A mass set to music, sung for the repose of the soul of a dead person.
