A fit of lunacy or madness; a period of frenzy; a crazy or unreasonable freak.
A concave figure formed by the intersection of the arcs of two circles on a plane, or on a sphere the intersection between two great semicircles.
A leash for a hawk.
A river in Lancashire, England, which passes Lancaster.
The word comes from the Latin lūna, which means "moon." It was adopted into English to refer to a crescent shape resembling the moon.