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English definition of “die off”

die off

verb [I] uk phrasal verb with die   /daɪ/ (present participle dying, past tense and past participle died) us  
If a group of plants, animals, or people dies off, all of that group dies over a period of time.Death and dying
(Definition of die off from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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