Definition of melt down in English:

melt down

1Collapse or break down disastrously: many expected him to melt down at the first sign of trouble
More example sentences
  • In spite of history-making efforts by governments around the world, financial markets everywhere are still melting down.
  • Next thing you know, her campaign melts down.
  • Just letting Citigroup melt down could have been catastrophic.
2(Of a nuclear reactor) undergo a catastrophic failure as a result of the fuel overheating: if the pumps that cool the reactor core become disabled the core could begin to overheat, and the reactor could melt down
More example sentences
  • Many expected him to melt down at the first sign of trouble.
See parent entry: melt

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