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Webster 1913 Edition

(ĭd′ĭ-ō̍-sy̆)

Noun.

[From

idiot

; cf. Gr. [GREEK] uncouthness, lack of education, fr. [GREEK]. See

, and cf.

The condition or quality of being an idiot; absence, or marked deficiency, of sense and intelligence.

I will undertake to convict a man of

idiocy

, if he can not see the proof that three angles of a triangle are equal to two right angles.

F. W. Robertson.

Noun.

[Gr. See Idiot.] A defect of understanding; properly, a natural defect.

Idiocy and lunacy excuse from the guilt of crime.