imbecility
noun
im·be·cil·i·ty
ˌim-bə-ˈsi-lə-tē 
plural imbecilities
1
a
: the quality or state of being very stupid or foolish : utter foolishness
… it seemed a very odd business, filled with illusions and delusions, at times noble to the point of imbecility and at other times base to the point of amorality.—
Colleen McCullough
Colleen McCullough
also
: futility
b
: something that is foolish or nonsensical
… his satire on the imbecilities and greed of politicians …—Nicholas Von Hoffman
Nicholas Von Hoffman2
dated, now offensive; see usage paragraph below
: the condition of being affected with moderate intellectual disability
Usage of Imbecility
The terms idiot, imbecile, moron, and their derivatives, such as imbecility, were formerly used as technical descriptors in medical, educational, and regulatory contexts. These uses were broadly rejected by the close of the 20th century and are now considered offensive.
Cite this Entry
“Imbecility.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/imbecility. Accessed 31 Oct. 2025.
Copy CitationKids Definition
imbecility
noun
im·be·cil·i·ty
ˌim-bə-ˈsil-ət-ē
plural imbecilities
1
: complete foolishness
2
: something very foolish
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