The Collaborative International Dictionary of English v.0.48:

Dairy \Dai"ry\ (d[=a]"r[y^]), n.; pl. Dairies (-r[i^]z). [OE.
   deierie, from deie, daie, maid; of Scand. origin; cf. Icel.
   deigja maid, dairymaid, Sw. deja, orig., a baking maid, fr.
   Icel. deig. [root]66. See Dough.]
   1. The place, room, or house where milk is kept, and
      converted into butter or cheese.
      [1913 Webster]

            What stores my dairies and my folds contain.
                                                  --Dryden.
      [1913 Webster]

   2. That department of farming which is concerned in the
      production of milk, and its conversion into butter and
      cheese.
      [1913 Webster]

            Grounds were turned much in England either to
            feeding or dairy; and this advanced the trade of
            English butter.                       --Temple.
      [1913 Webster]

   3. A dairy farm. [R.]
      [1913 Webster]

   Note: Dairy is much used adjectively or in combination; as,
         dairy farm, dairy countries, dairy house or dairyhouse,
         dairyroom, dairywork, etc.
         [1913 Webster]

WordNet (r) 3.0 (2006):

dairy
    n 1: a farm where dairy products are produced [syn: dairy,
         dairy farm]

Moby Thesaurus II by Grady Ward, 1.0:

72 Moby Thesaurus words for "dairy":
   appetizing store, armory, arsenal, assembly line, assembly plant,
   atomic energy plant, bakery, bakeshop, bindery, boatyard, bodega,
   boilery, bookbindery, brewery, brickyard, butcher shop, buttery,
   cannery, creamery, dairy house, defense plant, deli, delicatessen,
   distillery, dockyard, factory, factory belt, factory district,
   feeder plant, flour mill, food shop, food store, fruit stand,
   grocery, grocery store, groceteria, health food store,
   industrial park, industrial zone, larder, main plant, manufactory,
   manufacturing plant, manufacturing quarter, meat market, mill,
   mint, munitions plant, oil refinery, packing house, pantry, plant,
   pork store, pottery, power plant, production line,
   push-button plant, refinery, root cellar, sawmill, shipyard,
   spence, stillroom, subassembly plant, sugar refinery, superette,
   supermarket, tannery, vegetable store, winery, yard, yards