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.noun
- 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.
- 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 and may cause the core to sink into the earth
- a decline or breakdown in a situation or condition
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- Severe overheating of a nuclear reactor core, resulting in melting of the core and escape of radiation.
- Informal A disastrous or rapidly developing situation likened to the melting of a nuclear reactor core: “After several corporate meltdowns, only two reporters remain in [the] bureau” (David Fitzpatrick).
- Informal An emotional breakdown
meltdown - Computer Definition
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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meltdown - Cultural Definition
The most serious accident that can occur at a nuclear reactor. In a meltdown, the radioactive material in the reactor becomes very hot, melting some or all of the fuel in the reactor. A meltdown may or may not be followed by the release of radioactive material to the environment. A partial meltdown, with very little external radiation, occurred at Three Mile Island (see also Three Mile Island) in 1979; a complete meltdown happened at Chernobyl in 1986.
meltdown - Science Definition
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