stupidity

Universal Words noun (plural stupidities) 1 [U,C,usually pl.] behaviour that shows a lack of thought or good judgement: I couldn't believe my own stupidity. * the errors and stupidities of youth * The police were astonished at the sheer stupidity of drivers in going so fast in the fog. 2 [U] the state or quality of being slow to learn and not clever or intelligent: He faked stupidity to try to escape punishment for the crime.