/ Dictionary / Index I idiocy: Meaning and Definition of Find definitions for: id•i•o•cy Pronunciation: (id'ē-u-sē), [key] — pl. -cies. utterly senseless or foolish behavior; a stupid or foolish act, statement, etc. the state of being an idiot. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: idiocy (Thesaurus) idiocrasy idiodynamic Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language