Adjective quicksilver has 1 sense
- erratic, fickle, mercurial, quicksilver - liable to sudden unpredictable change; "erratic behavior"; "fickle weather"; "mercurial twists of temperament"; "a quicksilver character, cool and willful at one moment, utterly fragile the next"
Antonym: unchangeable (indirect, via changeable)
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Noun quicksilver has 1 sense
- mercury, quicksilver, hydrargyrum, Hg, atomic number 80 - a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures
--1 is a kind of metallic element, metal
--1 is a substance of cinnabar; calomel, mercurous chloride
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