noun

• (obsolete) A fit of lunacy or madness; a period of frenzy; a crazy or unreasonable freak.
  "Why woman, your husband is in his olde Lunes againe: […]"

noun

• (geometry) 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.
  "What he worried about was any eventual convexity, a shrinking, it might be, of the planet itself to some palpable curvature of whatever he would be standing on, so that he would be left sticking out like a projected radius, unsheltered and reeling across the empty lunes of his tiny sphere."

noun

• (hawking) A leash for a hawk.
  "And thenne was he ware of a Faucon came fleynge ouer his hede toward an hyghe elme / and longe lunys aboute her feet / and she flewe vnto the elme to take her perche / the lunys ouer cast aboute a bough / And whanne she wold haue taken her flyghte / she henge by the legges fast / and syre launcelot sawe how he henge"