Definitions
1.nounIron, or similar metals worked by a blacksmith
2.nounA subgenre of heavy metal employing fast tempos, shrieked vocals, highly distorted guitars, double-kick drumming and unconventional song structure, often emphasizing antireligious and misanthropic themes.
3.noun(1980s and early 1990s) Any form of extreme metal having a Satanic or anti-Christian theme.