[id.i.ot] n [ME, fr. L idiota ignorant person, fr. Gk idiotes one in a private station, layman, ignorant person, fr. idios one's own, private; akin to L suus one's own--more at suicide] (14c) 1: a person affected with idiocy; esp: a feebleminded person having a mental age not exceeding three years and requiring complete custodial care
2: a foolish or stupid person -- idiot adj