Definition of die-off
:a sudden sharp decline of a population of animals or plants that is not caused directly by human activity
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First Known Use of die-off
1936
die off
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verb
\
ˈdī-ˈȯf
\
Definition of die off
intransitive verb
:to die sequentially either singly or in numbers so that the total number is greatly diminished
First Known Use of die off
1697
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