utterly senseless or foolish behavior; a stupid or foolish act, statement, etc.: All this talk of zombies coming to attack us is pure idiocy.
Psychology. (no longer in technical use; considered offensive) an intellectual disability, previously classified in a now obsolete rubric of developmental disorders as having a mental age of less than three years old and an intelligence quotient under 25.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use idiocy in a sentence
In my column, I likened Thomas’ crash to the very relatable moments of idiocy that all of us suffer in our daily lives.
Radius is the robot that understands his station and chafes at the idiocy of his makers, having acted out his frustrations by smashing statues.
The ambulance took more than half an hour to arrive, which was a criminal idiocy.Police search home and office of Maradona’s doctor in death investigation | Ruby Mellen, Ana Herrero | November 29, 2020 | Washington Post
They were then amplified by social media algorithms “that were smart enough to spot a viral trend but dumb enough not to notice the idiocy of its content,” according to Wired, a technology magazine.How Coronavirus Fears Have Amplified a Baseless But Dangerous 5G Conspiracy Theory | Billy Perrigo | April 9, 2020 | Time
The present will dish up plenty of its own idiocy to hold our attention.
And a successful two-term Governor of a state where the balloting incompetence and idiocy is absolutely vital to the GOP.
“I think it comes from idiocy and cowardice,” said Whedon of the female superhero problem.Fear of a Minority Superhero: Marvel's Obsession with White Guys Saving the World | Marlow Stern | August 7, 2014 | THE DAILY BEAST
On The View, while she leads the show, she sat apart from the more hysterical caterwauling and general idiocy around her.
The full idiocy of conspiricism at its dreariest has thus been summoned to relativize the crime and, in so doing, deny it.
To this day Jean Kostka does not seem conscious of any element of idiocy in the variation of the old-fashioned name.Devil-Worship in France | Arthur Edward Waite
Inexhaustibly kind to undeserved misfortune, a little impatient of mere incompetence, implacable to continuous idiocy.The Creators | May Sinclair
The sight he was looking on would have sent three men out of five into gibbering idiocy.With Edged Tools | Henry Seton Merriman
Perhaps not until the child is six months old can the observer distinguish between blindness and idiocy.The Mother and Her Child | William S. Sadler
Physical inhibition in the growth of the brain involves, on the mental side, feeble-mindedness and idiocy.Psychotherapy | Hugo Mnsterberg
British Dictionary definitions for idiocy
(not in technical usage) severe mental retardation
foolishness or senselessness; stupidity
a foolish act or remark
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012