The Collaborative International Dictionary of English v.0.48:

MASH \MASH\, MASH \M*A*S*H\, n. (Mil.)
   An abbreviation for Mobile Army Surgical Hospital,
   consisting of the equipment and personnel required to perform
   emergency operations on injured soldiers, located in tents
   near the front lines of combat; as, he worked in the 25th
   MASH.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Mash \Mash\, n.
   A mesh. [Obs.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mash \Mash\, n. [Akin to G. meisch, maisch, meische, maische,
   mash, wash, and prob. to AS. miscian to mix. See Mix.]
   [1913 Webster]
   1. A mass of mixed ingredients reduced to a soft pulpy state
      by beating or pressure; a mass of anything in a soft pulpy
      state. Specifically (Brewing), ground or bruised malt, or
      meal of rye, wheat, corn, or other grain (or a mixture of
      malt and meal) steeped and stirred in hot water for making
      the wort.
      [1913 Webster]

   2. A mixture of meal or bran and water fed to animals.
      [1913 Webster]

   3. A mess; trouble. [Obs.] --Beau. & Fl.
      [1913 Webster]

   Mash tun, a large tub used in making mash and wort.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mash \Mash\, v. t. [imp. & p. p. Mashed; p. pr. & vb. n.
   Mashing.] [Akin to G. meischen, maischen, to mash, mix, and
   prob. to mischen, E. mix. See 2d Mash.]
   To convert into a mash; to reduce to a soft pulpy state by
   beating or pressure; to bruise; to crush; as, to mash apples
   in a mill, or potatoes with a pestle. Specifically (Brewing),
   to convert, as malt, or malt and meal, into the mash which
   makes wort.
   [1913 Webster]

   Mashing tub, a tub for making the mash in breweries and
      distilleries; -- called also mash tun, and mash vat.
      [1913 Webster]

WordNet (r) 3.0 (2006):

mash
    n 1: a mixture of mashed malt grains and hot water; used in
         brewing
    2: mixture of ground animal feeds
    v 1: to compress with violence, out of natural shape or
         condition; "crush an aluminum can"; "squeeze a lemon" [syn:
         squash, crush, squelch, mash, squeeze]
    2: talk or behave amorously, without serious intentions; "The
       guys always try to chat up the new secretaries"; "My husband
       never flirts with other women" [syn: chat up, flirt,
       dally, butterfly, coquet, coquette, romance,
       philander, mash]
    3: reduce to small pieces or particles by pounding or abrading;
       "grind the spices in a mortar"; "mash the garlic" [syn:
       grind, mash, crunch, bray, comminute]

Moby Thesaurus II by Grady Ward, 1.0:

188 Moby Thesaurus words for "mash":
   TV dinner, abrade, alfresco meal, all sorts, assemblage,
   assortment, atomize, barbecue, barley, bear, beat, bird seed, bran,
   bray, breakfast, brecciate, broad spectrum, bruise, brunch,
   buffet supper, butter, calf love, case, cat food, cataplasm, chew,
   chicken feed, chop, clambake, clutter, coffee break, comminute,
   conglomeration, contriturate, cookout, corn, crowd, crumb, crumble,
   crush, cushion, dental pulp, diner, dinner, disintegrate, dog food,
   ease, eatage, elevenses, ensilage, feed, fish fry, flour, fluff,
   fodder, forage, fragment, gallimaufry, gentle, grain, granulate,
   granulize, grate, grind, grind to powder, hash, hay, high tea,
   hodgepodge, hot luncheon, hotchpot, hotchpotch, hugger-mugger,
   infatuation, jam, jumble, jungle, knead, laxate, levigate, limber,
   limber up, litter, loosen, lunch, luncheon, macerate, magpie,
   massage, masticate, meal, meat breakfast, medley, melange, mellow,
   mess, milden, mill, mingle-mangle, miscellany, mishmash, mix,
   mixed bag, mollify, muddle, mush, oats, odds and ends, olio,
   olla podrida, omnium-gatherum, paper pulp, pash, passing fancy,
   paste, pasticcio, pastiche, pasturage, pasture, patchwork, pestle,
   pet food, petit dejeuner, picnic, pith, plaster, plump, porridge,
   potpourri, poultice, pound, powder, provender, pudding, pulp,
   pulp lead, pulpify, pulpwood, pulverize, puppy love, push,
   rag pulp, reduce to powder, relax, rummage, salad, salmagundi,
   sauce, scramble, scratch, scratch feed, scrunch, shake up, shard,
   shred, silage, slops, smash, soften, soften up, sponge, squab,
   squash, squeeze, squish, stew, straw, subdue, sulfate pulp,
   sulfite pulp, supper, supple, swill, tea, tea break, teatime,
   tenderize, tiffin, tone down, triturate, tumble, tune down,
   what you will, wheat, white lead, wiener roast, wienie roast,
   wood pulp



Easton's 1897 Bible Dictionary:

Mash
   (= Meshech 1 Chr. 1:17), one of the four sons of Aram, and the
   name of a tribe descended from him (Gen. 10:23) inhabiting some
   part probably of Mesopotamia. Some have supposed that they were
   the inhabitants of Mount Masius, the present Karja Baghlar,
   which forms part of the chain of Taurus.


Hitchcock's Bible Names Dictionary (late 1800's):

Mash, same as Meshech