1. heavy metal, metallic element, metal, alloy, metal
usage: a metal of relatively high density (specific gravity greater than about 5) or of high relative atomic weight (especially one that is poisonous like mercury or lead)
2. heavy metal, heavy metal music, rock 'n' roll, rock'n'roll, rock-and-roll, rock and roll, rock, rock music
usage: loud and harsh sounding rock music with a strong beat; lyrics usually involve violent or fantastic imagery