(समारोह, जिसमे शैतान की पूजा होती है)
A ceremony in which the Devil is worshipped
Syn- Midnight, dead of night, witching hour
E.g-1. Nobody attends the black mass.
2. She recently participated in a black mass and was used as the altar.
3. She also claimed to have knowledge of human sacrifices of infants during black masses.
4. Would the devil worshipers ever perform black masses ?