Webster's English Dictionary

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mania

Cross references:
  1. insanity              
 
ma.nia \'ma--ne--* also -ny*\ n [ME, fr. LL, fr. Gk mainesthai to be mad; 
   akin to Gk menos spirit -m more at MIND 1: excitement manifested by mental 
   and physical hyperactivity, disorganizat ion of behavior, and elevation of 
   mood; specif : the manic phase of manic-depressive psychosis 2: excessive 
   or unreasonable enthusiasm : CRAZE