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meltdown

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melt⋅down

  [melt-doun]
Use meltdown in a Sentence
–noun
the melting of a significant portion of a nuclear-reactor core due to inadequate cooling of the fuel elements, a condition that could lead to the escape of radiation.
Origin:
1960–65; n. use of v. phrase melt down
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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melt·down   (mělt'doun')   
n.  

  1. Severe overheating of a nuclear reactor core, resulting in melting of the core and escape of radiation.

  2. 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).

  3. Informal An emotional breakdown

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Science Dictionary
meltdown   (mělt'doun')  Pronunciation Key 
Severe overheating of a nuclear reactor core, resulting in melting of the core and escape of radiation.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Computing Dictionary

meltdown
network meltdown

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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