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Word of the day
for April 27
meltdown n
  1. (countable) An act or process of melting.
    1. (nuclear energy, uncountable) Severe uncontrolled overheating and melting of the fuel in the core of a nuclear reactor, with the potential for radiation to escape; (countable) an instance of this.
  2. (countable, rare) A mass of melted material.
  3. (originally US, figurative)
    1. (uncountable) Chiefly preceded by a descriptive word: uncontrolled disorder which often has disastrous consequences; (countable) a situation involving this; a crisis.
      1. (countable, finance) Synonym of crash (a sudden large decline in the value of money, stocks or other assets, etc., especially one that causes additional economic difficulties).
    2. (informal, uncountable) (Sudden) loss of control over one's behaviour, emotions, etc.; (countable) an instance of this.
      1. (countable) An emotional outburst; a fit, a tantrum.
      2. (countable, autism) A response to sensory overload or stress, in which an autistic person is overwhelmed by intense, seemingly disproportionate emotions, behaving erratically and becoming unable to mask (act more neurotypically).
      3. (countable, psychology) Synonym of nervous breakdown (an attack of a psychological disorder such as anxiety or depression which is so severe that it prevents a person from continuing to function normally); also (loosely), a situation where one is unable to function mentally due to panic, stress, etc.

Image The meltdown at the Chernobyl Nuclear Power Plant near the town of Pripyat in the Ukrainian Soviet Socialist Republic (now in Ukraine) happened on 26 April, 40 years ago, in 1986. It is regarded as the worst nuclear disaster to date.

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This is the English-language Wiktionary, where words from all languages are defined in English. For example, see the entry for the French word dictionnaire. To find a French definition of that word, visit the equivalent page in the French Wiktionary.

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