The Collaborative International Dictionary of English v.0.48:

Forge \Forge\, v. t. [imp. & p. p. Forged; p. pr. & vb. n.
   Forging.] [F. forger, OF. forgier, fr. L. fabricare,
   fabricari, to form, frame, fashion, from fabrica. See
   Forge, n., and cf. Fabricate.]
   1. To form by heating and hammering; to beat into any
      particular shape, as a metal.
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            Mars's armor forged for proof eterne. --Shak.
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   2. To form or shape out in any way; to produce; to frame; to
      invent.
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            Those names that the schools forged, and put into
            the mouth of scholars, could never get admittance
            into common use.                      --Locke.
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            Do forge a life-long trouble for ourselves.
                                                  --Tennyson.
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   3. To coin. [Obs.] --Chaucer.
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   4. To make falsely; to produce, as that which is untrue or
      not genuine; to fabricate; to counterfeit, as, a
      signature, or a signed document.
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            That paltry story is untrue,
            And forged to cheat such gulls as you. --Hudibras.
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            Forged certificates of his . . . moral character.
                                                  --Macaulay.

   Syn: To fabricate; counterfeit; feign; falsify.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Forge \Forge\ (f[=o]rj), n. [F. forge, fr. L. fabrica the
   workshop of an artisan who works in hard materials, fr. faber
   artisan, smith, as adj., skillful, ingenious; cf. Gr. ? soft,
   tender. Cf. Fabric.]
   1. A place or establishment where iron or other metals are
      wrought by heating and hammering; especially, a furnace,
      or a shop with its furnace, etc., where iron is heated and
      wrought; a smithy.
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            In the quick forge and working house of thought.
                                                  --Shak.
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   2. The works where wrought iron is produced directly from the
      ore, or where iron is rendered malleable by puddling and
      shingling; a shingling mill.
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   3. The act of beating or working iron or steel; the
      manufacture of metallic bodies. [Obs.]
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            In the greater bodies the forge was easy. --Bacon.
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   American forge, a forge for the direct production of
      wrought iron, differing from the old Catalan forge mainly
      in using finely crushed ore and working continuously.
      --Raymond.

   Catalan forge. (Metal.) See under Catalan.

   Forge cinder, the dross or slag form a forge or bloomary.


   Forge rolls, Forge train, the train of rolls by which a
      bloom is converted into puddle bars.

   Forge wagon (Mil.), a wagon fitted up for transporting a
      blackmith's forge and tools.

   Portable forge, a light and compact blacksmith's forge,
      with bellows, etc., that may be moved from place to place.
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The Collaborative International Dictionary of English v.0.48:

Forge \Forge\, v. i. [See Forge, v. t., and for sense 2, cf.
   Forge compel.]
   1. To commit forgery.
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   2. (Naut.) To move heavily and slowly, as a ship after the
      sails are furled; to work one's way, as one ship in
      outsailing another; -- used especially in the phrase to
      forge ahead. --Totten.
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            And off she [a ship] forged without a shock. --De
                                                  Quincey.
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The Collaborative International Dictionary of English v.0.48:

Forge \Forge\, v. t. (Naut.)
   To impel forward slowly; as, to forge a ship forward.
   [1913 Webster]

WordNet (r) 3.0 (2006):

forge
    n 1: furnace consisting of a special hearth where metal is
         heated before shaping
    2: a workplace where metal is worked by heating and hammering
       [syn: forge, smithy]
    v 1: create by hammering; "hammer the silver into a bowl";
         "forge a pair of tongues" [syn: forge, hammer]
    2: make a copy of with the intent to deceive; "he faked the
       signature"; "they counterfeited dollar bills"; "She forged a
       Green Card" [syn: forge, fake, counterfeit]
    3: come up with (an idea, plan, explanation, theory, or
       principle) after a mental effort; "excogitate a way to
       measure the speed of light" [syn: invent, contrive,
       devise, excogitate, formulate, forge]
    4: move ahead steadily; "He forged ahead"
    5: move or act with a sudden increase in speed or energy [syn:
       forge, spurt, spirt]
    6: make something, usually for a specific function; "She molded
       the rice balls carefully"; "Form cylinders from the dough";
       "shape a figure"; "Work the metal into a sword" [syn:
       shape, form, work, mold, mould, forge]
    7: make out of components (often in an improvising manner); "She
       fashioned a tent out of a sheet and a few sticks" [syn:
       fashion, forge]

Moby Thesaurus II by Grady Ward, 1.0:

93 Moby Thesaurus words for "forge":
   act like, affect, assume, beat, blacksmith shop, block out,
   bloomery, borrow, build, carve, cast, chisel, chorus, coin,
   concoct, construct, cook up, copy, counterfeit, create, crib, cut,
   devise, ditto, do, do like, echo, efform, fabricate, fake, falsify,
   fantasize, fashion, figure, fix, form, formalize, found, foundry,
   frame, fudge, furnace, go like, hatch, hew, hoke, hoke up, imitate,
   invent, knead, knock out, lay out, lick into shape, make,
   make like, make up, manufacture, metalworks, mint, mirror, model,
   mold, mould, plagiarize, pound, put together, reecho, reflect,
   repeat, reproduce, rough out, roughcast, roughhew, sculpt,
   sculpture, set, shape, shove the queer, simulate, smelter,
   smithery, smithy, stamp, steel mill, steelworks, stithy, tailor,
   thermoform, think up, trump up, turn out, utter, work