brain dead

Adjective

brain-dead (comparative more brain-dead, superlative most brain-dead)

1. (not comparable) Having an irreversible loss of brain function and cessation of brain activity.
   • An employee of the mayor's office was declared brain-dead on Sunday morning after she and another woman were struck by a hit-and-run driver while crossing Flatbush Avenue in Brooklyn, the authorities said.2010 February 22, Michael S. Schmidt, Karen Zraick, “Hit and Run in Brooklyn Leaves One Brain-Dead”, in The New York Times, →ISSN
2. (colloquial, derogatory) Having no useful thoughts; stupid; ditzy.
   • "AI has been brain-dead since the 1970s," said AI guru Marvin Minsky in a recent speech at Boston University. Minsky co-founded the MIT Artificial Intelligence Laboratory in 1959 with John McCarthy.2003 May 13, Mark Baard, quoting Marvin Minsky, “AI Founder Blasts Modern Research”, in Wired, →ISSN

See all 3 meanings of brain-dead