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Definition of brain death noun from the Oxford Advanced Learner's Dictionary

brain death

noun
 
/ˈbreɪn deθ/
 
/ˈbreɪn deθ/
[uncountable]
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  1. very serious damage to the brain that cannot be cured. A person who is suffering from brain death needs machines to keep them alive, even though their heart is still beating.
    • a diagnosis of brain death
See brain death in the Oxford Advanced American Dictionary
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