Source : Webster's Revised Unabridged Dictionary (1913)

Lea \Lea\, n. [Cf. {Lay}, n. (that which is laid), 4.] (Textile
   Manuf.)
   (a) A measure of yarn; for linen, 300 yards; for cotton, 120
       yards; a lay.
   (b) A set of warp threads carried by a loop of the heddle.

Lea \Lea\, n. [OE. ley, lay, As. le['a]h, le['a]; akin to Prov.
   G. lon bog, morass, grove, and perh. to L. lucus grove, E.
   light, n.]
   A meadow or sward land; a grassy field. ``Plow-torn leas.''
   --Shak.

         The lowing herd wind slowly o'er the lea. --Gray.

Source : WordNet®

lea
     n 1: a unit of length of thread or yarn
     2: a field covered with grass or herbage and suitable for
        grazing by livestock [syn: {pasture}, {pastureland}, {grazing
        land}, {ley}]