A religious ceremony associated with satanic worship, often involving dark symbolism.

काले बलिदान का अनुष्ठान

English Usage: The cult was rumored to hold a black mass every full moon.

Hindi Usage: इस संप्रदाय की अफवाह थी कि वे हर पूर्णिमा को काले बलिदान का अनुष्ठान करते हैं।