brain death n final cessation of activity in the central nervous system esp. as indicated by a flat electroencephalogram for a predetermined length of time
brain-dead adj
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irreversible brain damage as manifested by absolute unresponsiveness to all stimuli and absence of all spontaneous muscle activity such as respiration and shivering, in patients who do not have hypothermia or intoxication by central nervous system depressants. Called also irreversible coma and cerebral d.Medical dictionary. 2011.