requiem (rèk´wê-em, rê´kwê-) noun
1. Requiem Roman Catholic Church. a. A mass for a deceased person. b. A musical composition for such a mass.
2. A hymn, composition, or service for the dead.
[Middle English, from Latin, accusative of requiês, rest, the first word of the mass for the dead : re-, re- + quiês, quiet.]