meltdown Definition in Cambridge British English Dictionary
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Definition of "meltdown" - British English Dictionary

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meltdownnoun [C or U]

uk   us   /ˈmelt.daʊn/

meltdown noun [C or U] (NUCLEAR)

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 environment

meltdown noun [C or U] (FAILURE)

a complete failure, especially in financial matters: financial/economic/market meltdown The last few months have seen the progressive meltdown of the country's political system. informal an occasion when a person becomes extremely upset and is not able to deal with a problem or situation
(Definition of meltdown from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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