/ Dictionary / Index I imbecility: Meaning and Definition of Find definitions for: im•be•cil•i•ty Pronunciation: (im"bu-sil'i-tē), [key] — pl. -ties. the state of being an imbecile. an instance or point of weakness; feebleness; incapability. stupidity; silliness; absurdity. an instance of this. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: imbecility (Thesaurus) imbecilic imbed 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