Webster's English Dictionary

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idiot

Cross references:
  1. fool                  
 
id.i.ot \'id-e--*t\ n [ME, fr. L idiota ignorant person, fr. Gk idio-te-s 
   one in a]private station, layman, ignorant person, fr. idios one's own, 
   private; akin to L sed, se without, sui of oneself 1: a person afflicted 
   with idiocy; esp : a feebleminded person havi ng a mental age not exceeding 
   three years and requiring complete custodial care 2: a silly or foolish 
   person  - idiot aj