n. (pl. -ies)
1. foolishness; lack of good sense.
2 a foolish act, behaviour, idea, etc.
3 an ornamental building, usu. a tower or mock Gothic ruin.
4 (in pl.) Theatr. a a revue with glamorous female performers, esp. scantily-clad. b the performers.
Etymology: ME f. OF folie f. fol mad, FOOL(1)