Lune

Part of speech: noun (n.)

1. Anything in the shape of a half moon. [R.]

2. A figure in the form of a crescent, bounded by two intersecting arcs of circles.

3. A fit of lunacy or madness; a period of frenzy; a crazy or unreasonable freak. [Obs.] These dangerous, unsafe lunes i' the king. Shak.