requiem requiem /ˈrɛkwiːəm/

noun

1. A song or hymn of mourning composed or performed as a memorial to a dead person  ( coronach , lament , requiem , dirge , threnody , threnode )
   a song or hymn of mourning composed or performed as a memorial to a dead person
   

 Requiem

1. A Mass celebrated for the dead  ( Requiem )
   a Mass celebrated for the dead
    The church held a Requiem for the departed soul.
   The church held a Requiem for the departed soul.
   
   
2. A musical setting for a Mass celebrating the dead  ( Requiem )
   a musical setting for a Mass celebrating the dead
    Mozart's Requiem is a profound and emotional piece dedicated to the deceased.
   Mozart's Requiem is a profound and emotional piece dedicated to the deceased.