The Collaborative International Dictionary of English v.0.48:

Swath \Swath\ (sw[add]th; 277), n. [AS. swa[eth]u a track,
   trace; akin to D. zwaad, zwad, zwade, a swath of grass, G.
   schwad, schwaden; perhaps, originally, a shred. Cf. Swathe,
   v. t.]
   1. A line of grass or grain cut and thrown together by the
      scythe in mowing or cradling.
      [1913 Webster]

   2. The whole sweep of a scythe, or the whole breadth from
      which grass or grain is cut by a scythe or a machine, in
      mowing or cradling; as, to cut a wide swath.
      [1913 Webster]

   3. A band or fillet; a swathe. --Shak.
      [1913 Webster]

   Swath bank, a row of new-mown grass. [Prov. Eng.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

swath
    n 1: the space created by the swing of a scythe or the cut of a
         mowing machine
    2: a path or strip (as cut by one course of mowing) [syn:
       swath, belt]

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "swath":
   Indian file, array, articulation, bank, belt, buzz, catena,
   catenation, chain, chain reaction, chaining, concatenation,
   connection, consecution, continuum, course, cycle, descent, drone,
   endless belt, endless round, file, filiation, gamut, gradation,
   hum, line, lineage, monotone, nexus, path, pendulum, periodicity,
   plenum, powder train, progression, queue, range, rank, recurrence,
   reticulation, rotation, round, routine, row, run, scale, sequence,
   series, single file, spectrum, string, strip, succession, swathe,
   thread, tier, train, windrow