Meltdown definition

mĕltdoun
Frequency:
(informal) An emotional breakdown.
noun
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A severe overheating of a nuclear reactor core, resulting in melting of the core and escape of radiation.
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A severe overheating of a nuclear reactor core, resulting in melting of the core and escape of radiation.
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A disastrous situation; a failure or collapse.
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(informal) A fundamental breakdown in a situation, condition, or system.

A meltdown of the banking system.

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The definition of a meltdown is a situation where the fuel in a nuclear reactor overheats and causes the reactor core to melt, or a collapse of something.

When a nuclear reactor overheats, this is an example of a meltdown.

When the currency of a country starts to lose value and the economy starts to fall apart, this is an example of a meltdown.

When the stock market tumbles 1,000 points in a day, this is an example of a meltdown.

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A disastrous situation; a failure or collapse.
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A situation in which a rapid rise in the power level of a nuclear reactor, as from a defect in the cooling system, results in the melting of the fuel rods and the release of dangerous radiation.
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Severe overheating of a nuclear reactor core, resulting in melting of the core and escape of radiation.
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The total cessation of operation of a computer system or network. A system meltdown can be caused by hardware or software. A network meltdown can be caused by hardware, software or excessive traffic.
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Severe overheating of the core of a nuclear reactor resulting in the core melting and radiation escaping.

Four years have passed since the meltdown at the Chernobyl nuclear plant, but the grim legacy of the Soviet catastrophe is still unfolding.

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A situation being likened to a nuclear meltdown; a crisis.

Computer engineers were at a loss last night to explain why the Government had been hit by arguably the worst electronic meltdown in the history of Whitehall.

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(figuratively) A tantrum.
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(informal) An emotional breakdown.
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Other Word Forms

Noun

Singular:
meltdown
Plural:
meltdowns