I. Mercury BrE AmE noun
the ↑ planet that is nearest the sun:
Temperatures on Mercury reach as high as 700 K.
II. Mercury, Fred ‧ die /ˈfredi/ BrE AmE
(1946–91) the main singer with the ↑ pop group Queen. He was known for his unusual clothes and his exciting, energetic performances on stage. He died of AIDS.