Requiem (Lat. requies, 'rest'), a dirge or solemn service for the dead in the Roman Catholic Church. It consists in the celebration of the mass Pro Fidelibus Defunctis ('For the Faithful Departed'), the first words of the Introit of which are Requiem æternam.
Requiem
Chambers's Encyclopaedia, Volume 8: Peasant to Eoumelia, p. 656
Source scan(s): p. 0667