: a sudden sharp decline of a population of animals or plants that is not caused directly by human activity

Examples of die-off in a Sentence

Recent Examples on the Web
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Three environmental factors came together to create the perfect storm for die-off conditions. Irene Wright, USA Today, 28 May 2026 Dave Foster still remembers the 2022 trout die-off in Glen Canyon, a remote stretch of river between the dam and the start of the Grand Canyon. Dorany Pineda, Fortune, 27 May 2026 Dave Foster still remembers the 2022 trout die-off in Marble Canyon, a remote stretch of river between the dam and the start of the Grand Canyon. ABC News, 26 May 2026 The die-off followed an intense thunderstorm that dumped three inches of rain per hour on the Atlanta metro area Wednesday, which also flooded area streets resulting in flash flooding. Kate Petersen, CNN Money, 25 May 2026 See All Example Sentences for die-off

Word History

First Known Use

1936, in the meaning defined above

Time Traveler
The first known use of die-off was in 1936

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Cite this Entry

“Die-off.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/die-off. Accessed 9 Jun. 2026.

Kids Definition

die-off

noun
ˈdī-ˌȯf
: a sudden sharp drop in the numbers of plants or animals in a group
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