Folly Fol"ly, n.; pl. {Follies}. [OE. folie, foli, F. folie, fr. fol, fou, foolish, mad. See {Fool}.] 1. The state of being foolish; want of good sense; levity, weakness, or derangement of mind. [1913 Webster]

2. A foolish act; an inconsiderate or thoughtless procedure; weak or light-minded conduct; foolery. [1913 Webster]

What folly 'tis to hazard life for ill. --Shak. [1913 Webster]

3. Scandalous crime; sin; specifically, as applied to a woman, wantonness. [1913 Webster]

[Achan] wrought folly in Israel. --Josh. vii. 15. [1913 Webster]

When lovely woman stoops to folly. --Goldsmith. [1913 Webster]

4. The result of a foolish action or enterprise. [1913 Webster]

It is called this man's or that man's ``folly,'' and name of the foolish builder is thus kept alive for long after years. --Trench. [1913 Webster]

The Collaborative International Dictionary of English. 2000.