Source : Webster's Revised Unabridged Dictionary (1913)

Lawn \Lawn\, n. [OE. laund, launde, F. lande heath, moor; of
   Celtic origin; cf. W. llan an open, clear place, llawnt a
   smooth rising hill, lawn, Armor. lann or lan territory,
   country, lann a prickly plant, pl. lannou heath, moor.]
   1. An open space between woods. --Milton.

            ``Orchard lawns and bowery hollows.'' --Tennyson.

   2. Ground (generally in front of or around a house) covered
      with grass kept closely mown.

   {Lawn mower}, a machine for clipping the short grass of
      lawns.

   {Lawn tennis}, a variety of the game of tennis, played in the
      open air, sometimes upon a lawn, instead of in a tennis
      court. See {Tennis}.

Source : WordNet®

lawn mower
     n : garden tool for mowing grass on lawns [syn: {mower}]