WordWeb Online

1. Gruesomely indicative of death or the dead
   "the sepulchral darkness of the catacombs";
   - charnel, ghastly
    
2. Suited to or suggestive of a grave or burial
   "hollow sepulchral tones";
   - funereal
    
3. Of or relating to a sepulchre
   "sepulchral inscriptions"; "sepulchral monuments in churches"

See also: joyless, offensive