meltdown

2 ENTRIES FOUND:

melt·down

noun \ˈmelt-ˌdan\

: an accident in which the core of a nuclear reactor melts and releases radiation

: a very fast collapse or failure

: a very fast loss of emotional self-control

Full Definition of MELTDOWN

1
:  the accidental melting of the core of a nuclear reactor
2
:  a rapid or disastrous decline or collapse
3
:  a breakdown of self-control (as from fatigue or overstimulation)

Examples of MELTDOWN

  1. fears that an accident could cause meltdown
  2. a company experiencing financial meltdown
  3. After a long day at the beach, our toddler had a major meltdown in the car on the way home.

First Known Use of MELTDOWN

1956

Rhymes with MELTDOWN

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meltdown

noun    (Concise Encyclopedia)

Occurrence in which a huge amount of thermal energy and radiation is released as a result of an uncontrolled chain reaction in a nuclear power reactor. The chain reaction that occurs in the reactor's core must be carefully regulated by control rods, which absorb neutrons, and a moderator, which reduces their energy. If the core becomes too hot, it can melt, releasing large amounts of radiation. See also Chernobyl accident.

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