Alternative form of brainwave

Someone who does brain surgery. / (idiomatic) Someone very intelligent.

(medicine, not comparable) Having an irreversible loss of brain function and cessation of brain activity. / (colloquial) Having no useful thoughts; stupid; ditzy.

(informal) The temporary inability to think properly, or to remember something

(slang, derogatory) A fool.

(pathology) Alternative spelling of brain fever

A complex riddle or puzzle.

(pathology, dated) encephalitis or meningitis

(physics) A hypothetical self-aware entity that arises due to random fluctuations of spacetime.

(neuroanatomy, anatomy) The part of the brain that connects the spinal cord to the forebrain and cerebrum.