American English

Definition of demented adjective from the Oxford Advanced American Dictionary

     

    demented

     adjective
    adjective
    NAmE//dɪˈmɛntəd//
     
     
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  1. 1 behaving or thinking in a crazy way, especially because you are extremely upset or worried He was crashing about the house like a demented animal. a dark and demented sense of humor
  2. 2(old-fashioned or medical) having a mental illness
 
adverb
See the Oxford Advanced Learner's Dictionary entry: demented