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Definition of brain-dead adjective from the Oxford Advanced Learner's Dictionary

brain-dead

adjective
 
/ˈbreɪn ded/
 
/ˈbreɪn ded/
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  1. suffering from serious damage to the brain and needing machines to stay alive
    • Doctors declared her clinically brain-dead.
  2. (humorous) very stupid and boring; not intelligent
    • I was afraid of becoming brain-dead after months at home.
    Topics Feelingsc2
See brain-dead in the Oxford Advanced American Dictionary
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