1. 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. Loud and harsh sounding rock music with a strong beat; lyrics usually involve violent or fantastic imagery
   - heavy metal music, metal

Derived forms: heavy metals

Type of: alloy, metal, metallic element, rock, rock and roll, rock music, rock 'n' roll, rock-and-roll, rock'n'roll

Encyclopedia: Heavy metal

• engrain
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• underplay
• underpopulated
• underprice
• underprivileged
• underproduce
• underproduction
• underquote
• underrate
• underrating
• underreckoning
• underrun
• undersaturated
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• undersea
• underseal
• undersealed
• undersecretary
• undersell
• underseller
• undersexed
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• undershoot
• undershorts