Meltdown

['meltdaʊn] or ['mɛltdaʊn]

Definition

(noun.) a disaster comparable to a nuclear meltdown; 'there is little likelihood of a meltdown comparable to the American banking collapse in March 1933'.

(noun.) severe overheating of the core of a nuclear reactor resulting in the core melting and radiation escaping.

Typist: Theodore--From WordNet