meltdown

1 of 2

noun

melt·​down ˈmelt-ˌdau̇n 

1

: the accidental melting of the core of a nuclear reactor

2

: a rapid or disastrous decline or collapse

warning of a stock market meltdown

3

: a breakdown of self-control (as from fatigue or overstimulation)

an exhausted toddler having a meltdown

melt down

2 of 2

verb

melted down; melting down; melts down

intransitive verb

1

of a nuclear reactor : to undergo an accidental melting of the core

2

: to experience a very fast collapse or failure

The stock market melted down today.

transitive verb

: to melt (something) so that it can be used for another purpose

melting down gold coins

Synonyms of meltdown

Verb

• crack
• fall apart
• lose it
• choke
• flip (out)
• go to pieces
• break down
• wig (out)
• freak (out)
• break up

Examples of meltdown in a Sentence

Noun

fears that an accident could cause meltdown

a company experiencing financial meltdown

After a long day at the beach, our toddler had a major meltdown in the car on the way home.

Verb

rather than melt down, the team strengthened their resolve and ended up winning the game

Recent Examples on the Web

Noun

There are sure to be galley meltdowns, messy romances and power struggles. — Shivani Gonzalez, New York Times, 12 Oct. 2026

The sports media elite actively protects Colson after every baseline meltdown. — Alejandro Avila Outkick, FOXNews.com, 9 Oct. 2026

Verb

After the band melted down, Hughes went out on his own, releasing his 1977 solo debut, Play Me Out, the first of more than a dozen solo LPs he’s released. — Gil Kaufman, Billboard, 16 Oct. 2026

Ever since the Dodgers dropped a billion-dollar hammer on Shohei Ohtani and Yoshinobu Yamamoto, the rest of baseball has melted down. — Alejandro Avila Outkick, FOXNews.com, 14 Oct. 2026

Word History

First Known Use

Noun

1956, in the meaning defined at sense 1

Verb

1620, in the meaning defined at transitive sense

Rhymes for meltdown

• adown
• blowdown
• breakdown
• countdown
• crackdown
• crosstown
• downtown
• drawdown
• dropdown
• facedown
• godown
• hometown

Kids Definition

meltdown

noun

melt·​down ˈmelt-ˌdau̇n 

1

: the accidental melting of the core of a nuclear reactor

2

: a rapid or disastrous decline or collapse

a financial meltdown

3

: a breakdown of self-control (as from fatigue or overstimulation)