Id"i*o*cy (?), n. [From idiot; cf. Gr. uncouthness, want of education, fr. . See Idiot, and cf. Idiotcy.]
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.
© Webster 1913.