What Does The Word Folly Mean - A foolish action, practice, idea,. The prank was a youthful folly. Web folly noun (stupidity) add to word list [ c or u ] formal the fact of being stupid, or a stupid action, idea, etc.: The state or quality of being foolish; A foolish act or idea. She said that the idea. Lack of understanding or sense. An excessively costly or unprofitable.
Lack of understanding or sense. A foolish act or idea. She said that the idea. An excessively costly or unprofitable. A foolish action, practice, idea,. Web folly noun (stupidity) add to word list [ c or u ] formal the fact of being stupid, or a stupid action, idea, etc.: The state or quality of being foolish; The prank was a youthful folly.