The Collaborative International Dictionary of English v.0.48:

Grange \Grange\, n. [F. grange barn, LL. granea, from L. granum
   grain. See Grain a kernel.]
   1. A building for storing grain; a granary. [Obs.] --Milton.
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   2. A farmhouse, with the barns and other buildings for
      farming purposes.
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            And eke an officer out for to ride,
            To see her granges and her bernes wide. --Chaucer.
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            Nor burnt the grange, nor bussed the milking maid.
                                                  --Tennyson.
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   3. A farmhouse of a monastery, where the rents and tithes,
      paid in grain, were deposited. [Obs.]
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   4. A farm; generally, a farm with a house at a distance from
      neighbors.
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   5. An association of farmers, designed to further their
      interests, and particularly to bring producers and
      consumers, farmers and manufacturers, into direct
      commercial relations, without intervention of middlemen or
      traders. The first grange was organized in 1867. [U. S.]
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WordNet (r) 3.0 (2006):

grange
    n 1: an outlying farm

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "grange":
   arable land, barnyard, barton, cattle ranch, chicken farm,
   collective farm, cotton plantation, croft, dairy farm, demesne,
   demesne farm, dry farm, dude ranch, estate, factory farm, fallow,
   farm, farmery, farmhold, farmland, farmplace, farmstead, farmyard,
   fruit farm, fur farm, grain farm, grassland, hacienda, home place,
   homecroft, homefarm, homestead, house and grounds, house and lot,
   kibbutz, kolkhoz, location, mains, manor farm, messuage, orchard,
   pasture, pen, place, plantation, poultry farm, ranch, rancheria,
   rancho, sheep farm, station, steading, stock farm, toft,
   truck farm