req ‧ ui ‧ em /ˈrekwiəm, -em/ BrE AmE ( also ˌrequiem ˈmass ) noun [countable]
[ Date: 1300-1400 ; Language: Latin ; Origin: requies 'rest' ]
1 . a Christian ceremony in which prayers are said for someone who has died
2 . a piece of music written for a requiem