: a sudden sharp decline of a population of animals or plants that is not caused directly by human activity
died off; dying off; dies off
: to die sequentially either singly or in numbers so that the total number is greatly diminished
Examples of die-off in a Sentence
Recent Examples on the Web
Jack Prator, The Orlando Sentinel, 16 Aug. 2025
In late June, Mexico President Claudia Sheinbaum threatened to sue SpaceX if investigators determined that Musk's spaceflight company had contributed to undue pollution and marine life die-off in the country.
—Eric Lagatta, USA Today, 14 Aug. 2025
Daniella Walsh, Oc Register, 21 July 2025
In the five years since the events of Jurassic World Dominion, many of the dinosaurs and other formerly extinct creatures that were set free into the world have died off, unable to survive in the modern climate and otherwise hostile environments.
—Maureen Lee Lenker Published, EW.com, 30 June 2025
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Noun
Nearly 65 sawfish have been killed from an abnormal die-off, mostly in the Florida Keys, since December 2023, according to the state wildlife commission.
—Jack Prator, The Orlando Sentinel, 16 Aug. 2025
In late June, Mexico President Claudia Sheinbaum threatened to sue SpaceX if investigators determined that Musk's spaceflight company had contributed to undue pollution and marine life die-off in the country.
—Eric Lagatta, USA Today, 14 Aug. 2025
Verb
Again, Elliott said, the coyotes in the Village would eventually die off and new ones would come in.
—Daniella Walsh, Oc Register, 21 July 2025
In the five years since the events of Jurassic World Dominion, many of the dinosaurs and other formerly extinct creatures that were set free into the world have died off, unable to survive in the modern climate and otherwise hostile environments.
—Maureen Lee Lenker Published, EW.com, 30 June 2025
See All Example Sentences for die-off
Cite this Entry
“Die-off.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/die-off. Accessed 22 Aug. 2025.
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