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  • die-off
    die-off
    noun
    a sudden, natural perishing of large numbers of a species, population, or community.
  • die off
    die off
    Perish one by one, as in A celibate community, the Shakers are dying off. [Late 1600s]
Synonyms

die-off

American  
[dahy-awf, -of] / ˈdaɪˌɔf, -ˌɒf /

noun

  1. a sudden, natural perishing of large numbers of a species, population, or community.


die-off Scientific  
/ dīôf′ /
  1. A sudden, severe decline in a population or community of organisms as a result of natural causes. Local die-offs can be caused by such factors as an unusual or extreme weather pattern, an outbreak of disease, or toxic algal blooms in a body of water. Widespread or global die-offs in which a species or group of species becomes extinct are generally associated with rapid climate change or other large-scale environmental dislocations.


die off Idioms  
  1. Perish one by one, as in A celibate community, the Shakers are dying off. [Late 1600s]


Etymology

Origin of die-off

First recorded in 1935–40; noun use of verb phrase die off

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

In 2015, the antelope suffered a mass die-off and it was feared that the Ice Age survivors would become extinct.

From BBC Mar. 24, 2026

Earlier this year, scientists warned that bird flu had sparked the worst die-off on record for southern elephant seals when it spread among a population on Argentina's coast in 2023.

From Barron's Nov. 13, 2025

Mass coral die-off is underway and, unless global warming is reversed, large reef systems as we know them will disappear.

From Science Daily Oct. 13, 2025

He’s talking about the failure to recognize the consequences of climate change manifesting in the surrounding wetlands’ die-off.

From Salon Jul. 25, 2025

The die-off happened amazingly fast—the statistics, according to the study, suggest that it was instantaneous.

From "1491" by Charles C. Mann

Species develop a new specialty, exploit that niche, grow rapidly, die off slowly.

From The Wall Street Journal Jul. 28, 2026

If family farms die off and get “gobbled up” by giant corporations, consumer choices are reduced, Ross said.

From Salon Apr. 24, 2026

Beak Island experienced a large die off of south polar skuas.

From Science Daily Feb. 12, 2026

"Road salt is a major environmental problem," she told AFP, adding that "trees die off after prolonged exposure".

From Barron's Feb. 5, 2026

True, the conquistadors did not want the Indians to die off en masse.

From "1491" by Charles C. Mann

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