Main Page | See live article | Alphabetical index As an adjective, stupidity refers to the quality or condition of being stupid. As a noun, a stupidity is a stupid idea, remark or action. Stupidity is the antonym of intelligence and is synonym with imbecility, betise and folly. In the English language, stupidity comes from French stupidité which comes from the Latin stupiditas. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.