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English definition of “meltdown”

meltdown

noun [C or U] (NUCLEAR)    /ˈmelt.daʊn/
an extremely dangerous situation in a nuclear power station in which the nuclear fuel becomes very hot and melts through its container and escapes into the environmentAccidents and disastersDifficult situations and unpleasant experiencesFailuresEnergy, force and powerPower and intensity
(Definition of meltdown noun (NUCLEAR) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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