Definitions

from The American HeritageĀ® Dictionary of the English Language, 4th Edition

  • n. Severe overheating of a nuclear reactor core, resulting in melting of the core and escape of radiation.
  • n. 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] bureauā€ ( David Fitzpatrick).
  • n. Informal An emotional breakdown

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Severe overheating of the core of a nuclear reactor resulting in the core melting and radiation escaping.
  • n. A situation being likened to a nuclear meltdown; a crisis.
  • n. A tantrum.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. severe overheating of the core of a nuclear reactor resulting in the core melting and radiation escaping
  • n. a disaster comparable to a nuclear meltdown

Etymologies

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