Definitions of meltdown

n severe overheating of the core of a nuclear reactor resulting in the core melting and radiation escaping

nuclear meltdown
Type of:
excessive heating

n a disaster comparable to a nuclear meltdown

“there is little likelihood of a meltdown comparable to the American banking collapse in March 1933”
Type of:
calamity, cataclysm, catastrophe, disaster, tragedy
an event resulting in great loss and misfortune

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