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单词 meltdown
释义

meltdown

[ melt-doun ]
/ ˈmɛltˌdaʊn /
SEE SYNONYMS FOR meltdown ON THESAURUS.COM

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.
a quickly developing breakdown or collapse: a bond-market meltdown;the meltdown of a marriage.
Informal. a sudden loss of control over one’s feelings or behavior: My toddler had a meltdown when I tried to leave the house.

Origin of meltdown

First recorded in 1960–65; noun use of verb phrase melt down

Words nearby meltdown

Melrose, Melrose Abbey, Melrose Park, melt, meltage, meltdown, meltemi, melter, melting point, melting pot, melt in one's mouth
Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for meltdown

British Dictionary definitions for meltdown

meltdown
/ (ˈmɛltˌdaʊn) /

noun

(in a nuclear reactor) the melting of the fuel rods as a result of a defect in the cooling system, with the possible escape of radiation into the environment
informal a sudden disastrous failure with potential for widespread harm, as a stock-exchange crash
informal the process or state of irreversible breakdown or declinethe community is slowly going into meltdown
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for meltdown

meltdown

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.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Scientific definitions for meltdown

meltdown
[ mĕltdoun′ ]

Severe overheating of a nuclear reactor core, resulting in melting of the core and escape of radiation.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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