noun, plural im·be·cil·i·ties.

an instance or point of weakness; feebleness; incapability.
stupidity; silliness; absurdity.
an instance of this.
Psychology. (no longer in technical use; considered offensive) the state of being an imbecile.

Origin of imbecility

1525–35; earlier imbecillity < Latin imbēcillitās. See imbecile, -ity Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for imbecility

Contemporary Examples of imbecility

  • Condescension can be irritating in its expression of hysteria and imbecility, but that comes with freedom of speech.

    The Daily Beast logo
    Obama Loses His Cool

    Stanley Crouch

    June 9, 2010

Historical Examples of imbecility

Word Origin and History for imbecility

early 15c., "physical weakness, feebleness (of a body part), impotence," from Middle French imbécillité and directly from Latin imbecillitatem (nominative imbecillitas) "weakness, feebleness," from imbecillus "weak, feeble," traditionally said to mean "unsupported" (quasi sine baculo), from assimilated form of in- "not, opposite of" (see in- (1)) + baculum "a stick" (see bacillus). "Weakness in mind" (as opposed to body) was a secondary sense in Latin but was not attested in English until 1620s.

Online Etymology Dictionary, © 2010 Douglas Harper